This article describes the response to oral therapy with vitamin A in 3 dogs with focal cutaneous lesions consistent with seborrheic dermatitis and biopsy findings compatible with phrynoderma in man, and the lack of response in 7 other dogs with similar macroscopic lesions but biopsy findings not compatible with phrynoderma.
![purina vetcenter image](/sites/default/files/styles/article_header/public/article-images/Article%20400%20image_L_2.png?itok=ov0CLzZC)