May I ask which brands it is you've tried? I know some "over-the-counter" brands like you'd get at Petsmart are very dangerous. Biospot for one is known to have caused seizures and death in many small animals.
I've been using Frontline for years without any problems, but I know each dog is different.
__________________ He is your friend, your partner, your defender, your dog. You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion. -- Author Unknown |