My 1.5 year old golden retriever, Max, has a rash on his underside belly that extends down to his hind legs. There are red/pink areas that look like he's been itching. On his hind quarters there are some areas of black bumps that have the feeling of scabs. I put him on Sargeant's SENRYPRO XFC (which had scary reviews of pet seizures...and I promptly washed it off of him with dishwashing soap) and put the regular K-9 Advantix I usually bought on him about 5 days later. He has never had a skin problem and has always been in good health. I don't know what to do and need some guidance. I've attached a picture (hopefully it helps) and have more that I could send. Please...
