Why is my puppy's skin rash and hair loss worsening on antibiotics?

In most cases these skin infections, called bacterial pyoderma, are allergy-related. The antibiotics will help, but as you've experienced the skin problems will come back if the primary allergic disease isn't controlled. The hydroxyzine Becher took was an antihistamine, and that may have helped control the itchiness, however it sounds to me that he needs something a bit stronger to control the allergies and thus the skin infections. Talk to your vet about using Apoquel or Atopica on him; these are great drugs with minimal side effects that really help allergic dogs.

This could be due to a fungal infection, resistant bacterial infection, zinc responsive dermatitis, an autoimmune disease, seborrhetic dermatitis or even allergies. Sometimes a shampoo that is meant for doggy dandruff (seborrhea) is helpful as well as omega 3 fatty acids. Depending on the cause an antifungal may be needed as well as sometimes steroids. Some of these possible causes require a biopsy to diagnose, others a fungal culture and others are based on eliminating every other cause. I recommend discussing these potential causes with your veterinarian in order to get Ari's skin better managed.

It looks like Bruno has a skin infection. Parasites like mites and fleas can cause irritation of the skin that can lead to bacterial infections. If he has not had skin scrapings performed to look for mites, that would be my recommendation. If there are no mites, and he has been treated for fleas, then perhaps the topical medications he is on are not enough, and he needs an oral antibiotic to control the infection. I hope this helps. Thanks for using Petco Pet Education Center, formerly Petcoach.

If this is a recurring skin issue, he most likely had an underlying allergy. It could be an allergy to environmental things, or an allergy to the protein in the food. You can treat the infection, but it will keep returning if the underlying issue isn't also addressed. I would talk with your veterinarian about allergies. The antibiotics are not too harsh, and won't cause kidney damage

If the skin lesions became worse on prednisone one has to seriously consider that these lesions may be caused by mange mites. Your vet would need to take a skin scraping and hope to find a mite in the scraping (this is not easy). Mange mites do emit a sort of sweetish odor, so this would be another giveaway. Of course this could also be caused by a fungus or bacterial infection, however the lesions should have improved with the antibiotics given. You will need to take Buster back to your veterinarian for a recheck.

Thanks for using Petco Pet Education Center, formerly Petcoach! This is possibly due to allergies. It really comes down to figuring out what is causing his allergies so that they can be treated or the specific allergen avoided. A secondary infection is likely and also needs to be addressed. There are many things that can cause allergies though in most cases they can be broken down into 3 big categories: flea, food and environmental allergies. Allergies are usually worked up in a stepwise fashion starting with flea allergies as this is the easiest and cheapest to take care of. If not on a flea preventative, then it would be a good idea to get started on one. If already on one then it would be a good idea to change to something else (there are many new products out in the market). If not improved in 1-3 months then it is time to move on and check for food allergies by switching to a novel diet (new protein and new carbohydrate). If that does not seem to be the issue then you are left out having to check for environmental allergies which require blood and/or skin tests. Allergies can be very frustrating to deal with at first but so rewarding at the end when we are able to treat them effectively!

It is difficult for me to give you much advice without having more information but I will try my best. His skin may be getting worse due to an idiosyncratic drug reaction. The antibiotics may not be agreeing with him. A change to a different class of antibiotic may be all that is needed. The antibiotic he was prescribed may not be the correct one for this particular bacterial infection (if it is a bacterial infection). A culture and sensitivity of the crusty lesions on the head may need to be done in order to find out what bacteria are there and what antibiotic will be most effective. This may be a fungal skin infection (or yeast) and not a bacterial infection) hence why the antibiotic is not working. Antibiotics do not treat fungus or yeast. In young dogs I would be worried that this is a secondary infection of the skin from mange mites. It can be seen in older dogs as well but it is much more common in youngsters. So, I would have your vet do a skin scraping to check for mites. This could be an autoimmune disorder (like pemphigus). A biopsy of the affected area would be needed for diagnosis. That is all I can come up with right off the top of my head. I hope this helps to give you some things to bring up with your vet. Best wishes!