On this page, you'll find the following articles:

Macadamia Nuts are Toxic to Dogs

Recently, Jeff and Cathy Robb's Aussie, Panda ate a number of Hershey's chocolate Treasures miniatures which contained macadamia nuts.  She suffered neurological effects as a result of this and spent part of a day and the night in the Emergency Room.  She could not stand and had severe vomiting.  While the chocolate is also a danger to dogs, these nuts are extremely toxic to all dogs and can cause death from ingestion of only a very small amount.  The Robbs report that Panda is doing much better and they expect a full recovery.  If you suspect that your dog has eaten these nuts, even if it is a very small amount, don't take chances.  Get your dog to the vet for immediate help.

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Heat stroke and overheating in dogs: treatment & prevention.

An article by Nate Baxter, DVM

Oh the heat is here to stay (at least for the next five month)

The introductory comment is by the person who reposted the article to Canine-L.
This article was reposted on Canine-L, Discussion Forum for Dog Lovers on 6/8/1999.

Dearest Canine-L'er's:

I am taking the opportunity here to re-post (with permission, and permission is granted to re-post again as long as the originals are not edited and credit is given) a critical reminder about our beloved furbabies and their risk for heat stroke.
I was ... fortunate? ... that in the beginning of the first summer I had [my dog] I was at the vet's at a routine visit . . . a woman rushed in completely hysterical . . . her dog was incapacitated in the back seat of her car, heat-stricken..........they couldnt' save her, and I will never forget this big doggie's death-wracked gasps and gurgles and pants as she struggled to live while they were attempting to cool her down. Sorry to be so explicit but it's a deadly serious issue for our kids. She didn't make it :-(

The vet told me at the time to never push [my doberman] to even *walk* his regular route if he were reluctant, to wet him down, to respect any sign of exhertion and give lots of rest, shade & fluids. Anyway, enough of me.....

BEGIN ARTICLE

Guideline and overview for dogs that overheat.

This is posted with the permission of the author Nate Baxter, DVM and is a guideline and overview for dogs that overheat. While it was written for working retrievers the information applies to any dog exerting itself in warm or very humid conditions.

Nate wrote:

. . . . .The first thing that needs to be understood is that dogs and people are different enough that most of the info cannot cross lines. I do not profess to know what the appropriate procedures for people other than what I learned in first aid.

Electrolyte replacement: Dogs do not lose enough electrolytes thru exercise to make a difference, but if the dog gets truly into heat stroke the physiology changes will make them necessary. BUT oral replacement at that point is futile, they need IV and lots of it.

Cooling: The point of evaporative cooling being the most efficient is correct. However, in a muggy environment, that will not help as much, so I do cool with the coldest water I can find and will use ice depending on the situation. The best way is to run water over the dog, so there is always fresh water in contact. When you immerse a dog in a tub, the water trapped in the hair coat will get warm next to the dog, and act as an insulator against the cool water and cooling stops. If you can run water over the dog and place it in front of a fan that is the best. Misting the dog with water will only help if you are in a dry environment or in front of a fan.

Just getting the dog wet in not the point, you want the water to be cool itself, or to evaporate.

For MOST situation all you will need to do is get the dog in a cooler environment, ie shade, or in the cab of the truck with the air conditioning on (driving around so the truck does not overheat and the AC is more efficient).

This past summer I was very concerned about my dogs getting too hot in the back of my black pickup with a black cap. Boy I wish I got another color 6 years ago<G>.

When I had one dog I just pulled the wire crate out of the car and put it in some shade and hopefully a breeze. But having 2 dogs and running from one stake to another, that was not feasible. So I built a platform to put the wire crates on, this raises the dog up in the truck box where air flow better. Then I placed a 3 speed box fan in front blowing on the dogs with a foot of space to allow better airflow.

I purchased a power inverter that connects to the battery and allows the 3 speed fan to run from the truck power. It has an automatic feature that prevents it from draining the battery. When I turned that fan on medium I would find that the dogs where asleep, breathing slowly and appeared very relaxed and comfortable in a matter of 20 minutes or less, even on very hot muggy days.

Alcohol: {Rubbing Alcohol] I did not carry it but probably will next year. It is very effective at cooling due to the rapid evaporation. It should be used when other methods are not working, but do not hesitate to use it. Due to the thicker skin and rapid evaporation I do not worry about it being absorbed. Plus we recommend using rubbing alcohol, which is propylene alcohol, not ethyl, for those of you not aware. So do not try to drink it<VBG>.

I purchased those cooling pads, but found that the dogs would not lay on them. I would hold them on the back of a dog that just worked to get a quick cool, but probably will not mess with them next summer. I also bought a pair of battery operated fans but found them pretty useless. Spend your money on the power inverter and get a real fan.

Watching temp: If you feel your dog is in danger of heat injury, check its temp and write it down. Keep checking the temp every 3 minutes. Don't forget to shake it down completely each time, sounds silly, but when are worried about your companion, things tend to get mixed up.

This is VERY IMPORTANT:

Once the temp STARTS to drop, STOP ALL COOLING EFFORTS. The cooling process will continue even though you have stopped. If the temp starts at 106.5, and then next time it drops to 105.8, stop cooling the dog, dry it off, and continue monitoring. You will be amazed how it continues to go down. If you do not stop until the temp is 102, the temp will drop on down to 99 or even lower. I cannot emphasis that point enough.

Limit water: When the dog is so heated that it is panting severely, only let it have a few laps of water. Water in the stomach does not cool the dog, you just need to keep the mouth wet so the panting is more effective. Do not worry about hydration until the temp has started down. A dog panting heavily taking in large amounts of water is a risk of bloat. Due to the heavy panting they will swallow air mix in a large amount of water they can bloat. Once the temp is going down and panting has slowed to more normal panting then allow water. The dog will rehydrate it self after temp is normal.

If the dog has a serious problem and even though you have gotten the temp normal, get the dog to a vet, as it can still need IV fluids and some medication. Also, a case of heat stroke can induce a case of hemorrhagic gastroenteritis (not parvo), with a ton of very bloody diarrhea and a lot of fluid and electrolyte loss. These cases need aggressive treatment.

Prevention: The best method of treatment is prevention. Learn to watch your dog, and see the changes in the size of the tongue, and how quickly it goes down. Learn your dogs response to the different environments, and be careful when you head south for an early season hunt test or trial. I have been to Nashville at the end of May the last 2 years, only 5 hours away, but the difference in temp and humidity did effect the dogs as they were used to more spring weather in Ohio. Try different things in training to help the dog cool and learn what works better.

Another very important point:

Do not swim your hot dog to cool it then put in put in a box/tight crate. Remember, evaporation can not take place in a tight space, and the box will turn into a sauna. Carry a stake out chain, and let the dog cool and dry before putting it up.

Whew!! Did not think this would get so long. I hope this is easy to understand and helps provide some info that will be useful.

Remember: Prevention, learn your dog. It is worth the time and effort.

Now all we need is for spring to get here and we can hit training hard!!

Nate Baxter, DVM
Northstar Labradors
Lebanon, OH
North Star's Lady Raven, MH, WCX

Canine Hyperthermia Heat Stroke

The canine regulates body temperature mainly through respiration (i.e. panting). When the heat load exceeds the capacity of the body to remove the heat, hyperthermia occurs. Body temperatures can range anywhere from 105° to 110° Fahrenheit and sometimes even higher.
 

The physiological effects of heat stroke affect all organs and body systems.


The information contained on this site is not intended to provide individual veterinary advice or diagnosis. You should consult a veterinarian with specific questions about or for specific diagnosis of a patient’s health. Acting on any information provided without first consulting a veterinarian is solely at the reader’s risk.

 

Heatstroke is most commonly caused by confinement in an overheated enclosure such as a car. Other causes of heat stroke are over-exertion in a hot and humid environment, toxicities that cause seizures or muscle tremors, and airway obstructions. There are many contributing factors to heat stroke. They include the amount of heat, length of exposure, amount of air circulation, humidity, anxiety of the patient, breed of the dog, age, obesity, and pre-existing medical conditions.

Initial signs of hyperthermia include increased body temperature, panting, excitement, tachycardia, and brick-red mucous membranes. Other clinical signs may include vomiting, hypersalivation, ataxia, collapse, and diarrhea. As the hyperthermia progresses, respiratory distress, cyanosis, hemoconcentration, shock and stupor develop. Once the hyperthermia becomes terminal, then anuria, seizures, coma, and respiratory arrest occur.

The physiological effects of heat stroke affect all organs and body systems. A body temperature of 107° Fahrenheit or higher will rapidly produce cellular necrosis associated with heat denaturization of cellular proteins. There is also an overall increase in cellular metabolism and oxygen demands by the various organ systems. The effects on the cardiovascular system can be severe, causing increased myocardial oxygen demand, myocardial degeneration, and necrosis. Hypoxia will eventually lead to hypotension, hemoconcentration, and hypovolemic shock. The acid-base balance and electrolytes will also be affected. Panting will lead to respiratory alkalosis. Increased cellular metabolism, muscle spasms and shock will result in metabolic acidosis. Hyperkalemia and hypercalcemia can occur and hypocalcemia will occur if the patient becomes terminal. The kidneys are also severely affected. Renal tubular necrosis and acute renal failure may occur. There can also be necrosis of the gastrointestinal mucosa, which will cause hemorrhagic vomiting and diarrhea. Neuronal degeneration (brain damage) and cerebral edema will occur if the temperature is high enough. The final complication that can occur is disseminated intravascular coagulation.

The immediate treatment is to reverse the hyperthermia. Immersing or soaking the patient in cool water should be performed immediately. Ice packs around the head and neck will also help. Portable fans significantly help with evaporation, which increases cooling. If you have a hyperthermia patient that is not responding, then cool water enemas are indicated. Keep in mind that once an enema has been performed, rectal temperatures will not be accurate. Once the body temperature has reached 103°, all cooling efforts must be stopped. Dry off the patient and monitor temperature every 10 minutes. It is not uncommon for the patient to become hypothermic and every effort must be taken to prevent too precipitous a drop in temperature. The patient must also be treated for shock. An intravenous catheter and fluids should be started immediately. The fluids will also help aid in cooling the patient. If the patient is in severe respiratory distress, which occurs often in brachiocephalic dogs, then sedation and establishment of an airway may be necessary. Oxygen should be provided if possible because of the increased demand. The easiest way to provide oxygen is either by high flow in front of the patients face or if possible, nasal oxygen. Use of a mask is contraindicated, as they will be re-breathing heated air and the potential for hypercapnea is high. If there is evidence of cerebral edema, then the use of mannitol may be indicated. Steroids may also be indicated.

Once the initial crisis has been treated, the patient must be monitored closely for 48-96 hours depending on the patient’s response. Monitoring should include body temperature, urine output, and blood work including PCV, TP, BUN, creatinine and coagulation values. Evidence of DIC should be watched for carefully. Level of consciousness and neurological signs should also be evaluated.

Hyperthermia can have catastrophic results. The best prevention is education of the client. Rapid response and aggressive treatment is essential for survival.

GLOSSARY

DIC- disseminated intravascular coagulation: widespread formation of thromboses in the microcirculation, mainly within the capillaries. It is a secondary complication of a wide variety of disorders all of which activate in some way the intrinsic coagulation sequence. The intravascular clotting ultimately produces hemorrhage because of rapid consumption of fibrinogen, platelets, prothrombin and clotting factors. Hemoconcentration: increase in the proportion of formed elements in the blood, as a result of a decrease in its fluid content, e.g. in clinical dehydration.

Anuria: complete suppression of urine formation by the kidney.

Stupor: partial or nearly complete unconsciousness.

Myocardial: Pertaining to the muscular tissue of the heart.

Hypercapnea: excess of carbon dioxide in the blood.


Reference: Reference: Saunders Comprehensive Veterinary Dictionary

Handbook of Veterinary Procedures and Emergency Treatment

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TOXIC: Raisins and Grapes

This week I had the first case in history of raisin toxicity ever seen at
MedVet. My patient was a 56-pound, 5 yr old male neutered lab mix who ate
half a canister of raisins sometime between 7:30 AM and 4:30 PM on
Tuesday. He started with vomiting, diarrhea and shaking about 1AM on
Wednesday but the owner didn't call my emergency service until 7AM.

I had heard somewhere about raisins AND grapes causing acute Renal failure
but hadn't seen any formal paper on the subject. We had her bring the dog
in immediately. In the meantime, I called the ER service at MedVet, and
the doctor there was like me -had heard something about it, but....Anyway, we
contacted the ASPCA National Animal Poison Control Center and they said to
give IV fluids at 1 Ã,½ times maintenance and watch the kidney values for
the next 48-72 hours.

The dog's BUN (blood urea nitrogen level) was already at 32 (normal less
than 27) and creatinine over 5 ( 1.9 is the high end of normal). Both are
monitors of kidney function in the bloodstream. We placed an IV catheter
and started the fluids. Rechecked the renal values at 5 PM and the BUN was
over 40 and creatinine over 7 with no urine production after a liter of
fluids.

At the point I felt the dog was in acute renal failure and sent him on to
MedVet for a urinary catheter to monitor urine output overnight as well as
overnight care.

He started vomiting again overnight at MedVet and his renal values have
continued to incr ease daily. He produced urine when given lasix as a
diuretic. He was on 3 different anti-vomiting medications and they still
couldn't control his vomiting. Today his urine output decreased again, his
BUN was over 120, his creatinine was at 10, his phosphorus was very
elevated and his blood pressure, which had been staying around 150,
skyrocketed to 220. He continued to vomit and the owners elected to
euthanize.

This is a very sad case - great dog, great owners who had no idea raisins
could be a toxin. Please alert everyone you know who has a dog of this
very serious risk. Poison control said as few as 7 raisins or grapes could be
toxic. Many people I know give their dogs grapes or raisins as treats
including our ex-handler's. Any exposure should give rise to immediate
concern.

Laurinda Morris, DVM
Danville Veterinary Clinic
Danville , Ohio

Some links with additional info on toxic foods for animals:

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TOXIC: Top Ten Poisons for Dogs

There is a good article up on MSN by veterinarian Deb M. Eldredge called Poisons, Poisons, Everywhere! It lists the ten most common poisons ingested by dogs. They are:

  • Ibuprofen
  • Chocolate
  • Ant & Roach Baits
  • Rodenticides
  • Acetaminophen
  • Pseudoephedrine Containing Cold Medications
  • Thyroid Hormones
  • Bleach
  • Fertilizer, Including Plant “Foods”
  • Hydrocarbons Including Paints, Polishes, and Fuel Oils

Click on the link to the article to get lots of good details. Additionally, go to the ASPCA Animal Control Poison Center for lots of links and information. Their 24 hour hotline number is (888) 426-4435.

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