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My purebred lab has skin and ear allergies. This summer has

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My purebred lab has skin...
My purebred lab has skin and ear allergies. This summer has been the worst. He has had three significant outbreaks of losing hair, itching, ear infections, losing weight. I've taken him to the vet each time and they've given him prescriptions -- steroids, antibiotics. He has it again and I'm concerned it may be something other than allergies. What do you think?
Submitted: 2 years ago.Category: Dog Veterinary
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9/2/2015
Dog Veterinarian: Dr. Kara, Veterinarian replied 2 years ago
Dr. Kara
Dr. Kara, Veterinarian
Category: Dog Veterinary
Satisfied Customers: 17,513
Experience: Over 20 years of experience as a veterinarian.
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Hello, my name is***** and I have over 20 years of experience as a veterinarian. I am sorry to hear that your fellow has had a miserable summer suffering with allergy symptoms of losing hair, itching, ear infections, losing weight.

If his symptoms seemed to clear up with treatment, only to return a few weeks later then he likely does have allergies. His allergies and the symptoms they cause are just getting worse with age and he may be adding more things that he is allergic to every year, which makes his "allergy season" longer and symptoms returning quickly and to a more severe degree in years past. Dogs that have one allergy often develop several with time. The effect of multiple allergies aren't additive, they actually compound one another.

I understand it is frustrating but allergies are not something we can treat and cure. The best we can do is avoid the allergen, try to improve his tolerance to it, decrease his body's reaction to the allergen with medication and control secondary skin and ear infections.

I do think given that he is suffering from multiple episodes this summer that we can do better for him.

Even if you don't see fleas I do recommend using protection. Flea bite allergy is the most common allergen and it only takes one bite a month to make an allergic dog scratch so I recommend using flea prevention even if you never see one again. Frontline Plus, Advantage II or Advantix are excellent topicals and the new Seresto flea and tick collar is too, giving constant protection for 6-9 months, and is the only collar I recommend. Don't use over the counter products, especially Hartz or Sargents, as most are ineffective if not toxic. Unfortunately even after the fleas are gone the allergic reaction can continue for weeks and I will discuss controlling that reaction below.

Other allergens can be inhaled (like grass pollen, dust mites or molds).

You can use a combination of antihistamines and high doses of omega-3 fatty acids to help prevent his body's reaction to those (they also help with the symptoms of flea allergy). You must start these about 2 weeks before the allergen is present in the environment to get the best response. In combination fatty acids and antihistamines work synergistically, much better than either one alone. If his symptoms worsen seasonally I would think that inhaled allergens are a part of his problem.

You can try:

1)Benadryl (diphenhydramine only don't use the combination products with acetaminophen or decongestants as they can be toxic for dogs) at 1mg to 2mg per pound of body weight or one 25mg capsule per 15 to 25 pounds of body weight orally every 8 hours.

OR 2)Claritin (loratidine) at 5mg per 25 pounds of body weight once or twice daily.

OR 3)Hydroxyzine at 1mg per pound of body weight orally every 8 hours.

OR 4) Chlorpheniramine at 4mg to 8mg per dog once or twice daily.

OR 5) Zyrtec (Cetirizine hydrochloride) at 1/2 mg per pound of body weight orally every 24 hours. That would be one 10mg tablet per 20 pounds of body weight. Make sure it is NOT the formulation with a decongestant (such as Zyrtec-D) because dogs cannot tolerate decongestants.

Some dogs do better on one antihistamine rather than another. Give the one you pick a week trial and if it isn't working try another. Be aware antihistamines can cause sleepiness or hyperactivity in some dogs. These side effects do wear off with repeated use.

Omega-3 fatty acids are fish oil products. 3V by DVM or Derm Caps ES are good brand name products. Use the high end of the dosing schedule for your pup's weight. I recommend a dose based upon the EPA portion (eicosapentanoic acid) of the supplement as if we do that the rest of the supplement will be properly balanced. Give him 20mg of EPA per pound of body weight per day. For example an 80 pound dog could take 1600mg of EPA per day.

Cool water baths with an oatmeal shampoo or chlorhexiderm shampoo (which is antibacterial and antifungal) and a conditioner with an antihistamine may help. The water rinses off allergens and the cool temperature soothes itchy skin. Do not bathe your fellow for 2 to 3 days before or after applying flea control products or the bath will interfere with the product's efficacy.

Food allergy is very possible with him too if he seems to be itchy all year round and ear infections are part of his trouble. Dogs can develop allergies to any protein or carbohydrate so even if he is only fed one thing that can be what he is allergic to. Dogs with food allergies tend to lick and scratch their paws, face and ears the most, but any of the "allergy reactive areas" can be affected.

Make sure that the food that you put him on is a true hypoallergenic diet. The trouble with "limited ingredient" or "low allergy" pet store brands is that the same machinery is used on multiple lots of food without sterilization cleaning in between. So for example even if a food says it has salmon and rice if the previous batch had beef and corn then you will get traces of those ingredients in your bag of food. Not a big deal if your dog isn't allergic but a waste of money thinking that the food was hypoallergenic and not good for your dog if those happen to be allergens for your dog. The veterinary brand true hypoallergenic foods are more expensive because it isn't cheap to thoroughly remove all traces of a previous food mixture from the machines used to process food.
Generally what I recommend is trying to clear the skin with a prescription food and then adding one food item (chicken, beef, corn wheat etc) every month to see what they react to.

Once we know what he reacts to then we can find a regular food to try, avoiding his allergens. As far as permanent diets I do tend to stick with Purina Pro Plan brands or Nature's Recipe as I find those rarely if ever have cross contamination. Purina Pro Plan Turkey and Barley or Nature's Recipe Vegetarian or Venison are pretty good products. I know that this isn't easy from personal experience (my dog is allergic to wheat) and it is time consuming, but worth it.

If you choose to try testing/treating him for a food allergy I recommend that you try a true hypoallergenic diet like Hills z/d or Purina Veterinary Diets HA. No treats, flavored medication or bones while on the diet and it must be used for a least 12 to 16 weeks to see the full effects. You should see some improvement in 6 to 8 weeks.

Another option if the antihistamines and omega 3's aren't enough is a product called Atopica. It suppresses the immune system a bit so it decreases allergic symptoms but it doesn't have as many harmful side effects as systemic steroids.

Another option is a brand new drug called Apoquel (generic name oclacitinib) which interferes with the allergic pathway. It works very quickly to stop the symptoms of an allergy. Most dogs are reported to be much more comfortable in a day or so. Unfortunately it is on backorder now due to overwhelming demand, but it is something to keep in mind for the future if he continues to have trouble.

If you are interested discuss either of these medications with your veterinarian as they are prescription products.

Another option if you are interested, is trying immunotherapy. Your fellow would need to be tested to determine exactly what he is allergic to, and then he is given small amounts of the allergen to build up his tolerance to it, increasing the amount of allergen in the injection incrementally so that his immune system no longer responds to it. This isn't a quick fix, it takes time to slowly build up their tolerance and as he develops new allergens things may need to be added, but it is an option.

If it's been a while since his last exam parasites like cheyletiella, demodex or sarcoptes mites should be looked for by your veterinarian as well if he isn't improving as they can lead to very itchy skin.

Please let me know if you have any further questions.

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Dog Veterinarian: Dr. Kara, Veterinarian replied 2 years ago
Hi,
I'm just following up on our conversation about your pet. How is everything going?
Dr. Kara
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