I used Heartguard for years with no problems. I personally would go ahead and use it. The only reason I switched from Heartguard to Interceptor was because after I moved and changed vets, my new vet didn't carry Heartguard (at that time - he does now).
__________________ 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 |