I did get a flea/tick control from Petsmart - called bio spot? And their problems started shortly after applying the product to them. The active ingredients in it are: Permethrin (CAS #52645-53-1) 45%, (S) Methoprene (CAS #65733-16-6) 3%, Other ingredients 52% which is does not say what they are. These dogs have sensitive skin, so I try not to use any chemicals on them. Could they be allergic to this product. Never have they had anything like this, and I have had each, since they were 10wk old pups. I ask these Q's thru this site, because I am on disability and fixed income. They were at their Vet every six months until a few years ago until my income was limited. I need to try and help them or cure this problem myself if possible. Thank You, Ian
Dog Veterinarian
7 years of clinical veterinary medicine and 17 years experience caring for household pets.