Slugger is a 45 pound short-hair mutt. Long-time family pet. He takes Sentinel and Advantage. Has a skin condition: black areas, much itching. TV ads say Sentinel can cause skin problems. Does this sound like such? Thank you.
No, this does not sound like it is from the sentinal. I recommend a visit to the vet. It could be a "hot spot" or a skin infection. Good luck, vetcare