My dog has diarrhea after Heartgard and vet visit. Is it normal?

Question

Can heartgard cause a dog to do diarrhea? Look at the pics please!! I gave him heartgard at 10 am at the vet when we got home at 11:50!he did the restroom like this? Is this normal?! I called his vet and sent him picture he said it was normal but I want to make sure.. Pet's info: Dog | Shih Tzu | Male | unneutered | 1 year and 11 months old | 13 lbs

Linda G, MS, DVM · Accepted Answer

Hello, & thank you for using Petco Pet Education Center, formerly Petcoach. I do not think you have anything to worry about. The stool could look this way more from the stress of the veterinary visit, than from the Heartgard. It can take approximately 8 hours from the time a substance is swallowed to the time it is passed back out, so I very much doubt that the medication caused this. Now, if Max had vomited within 30 minutes or so of swallowing the Heartgard, then I would say this is the probable cause. So, as long as he is eating & drinking regular, & his stool does not get looser, then he will be perfectly fine.

My dog has diarrhea after Heartgard and vet visit. Is it normal?

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