Why is my dog's skin darkening after pyoderma 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.

I'm sorry to hear Abe is having skin issues. I would be concerned by the progression of his skin that he may have something more going on in addition to the bacterial infection, such as allergies, a skin parasites (mites or fleas) or a fungal infection. I would recommend he be re-evaluated to determine if something more is going on and additional treatment is needed. Good luck!

Probably nothing to be worried about. I would continue to monitor it for new breakouts, greasy or flaky skin. Thank you for the pictures! Hyperpmentation can be normal, especially after recent skin inflammation. Thank you for contacting me today!

It does look like a bacterial skin infection which could have started from a bite. Cephalexin is a very good skin antibiotic. I suggest you take Echo back to the vet tomorrow for a recheck. The vet may want to do a little biopsy to send to a lab to determine what is causing this lesion.

The change is stool color is probably from the medication or new supplement. It doesn’t look like it is from blood from the photo. As long as he’s feeling fine finish the antibiotics and check the stool after they are done. It should go back to his normal stool color. If the dark stool continues then I recommend having it checked for occult blood and intestinal parasites. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for Bruno.

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

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.