You might try getting a second opinion from another vet. I once had a cat who would chew and pluck all her hair off of her stomach area. We never found any fleas on her, but once she was put on a prescription medicine like Program, she was fine and the hair grew back. Your Pyr may need antibiotics or something oral to relieve the itching. -Emily Hainsworth Castle Rock, CO D3melza@aol.com