Kia threw up the Sentinel pill only a few minutes after I gave it to her. I called the vet and he told me to give her a new pill. I did and she threw that one up too.

He said the medicine can be too strong for some dogs, so we switched her to Heartgard and she was okay with that.

Kia was real sick after getting the ProHeart6 injection.

She's back on Heartgard now.

Did you give the medicine to Casey after he had a meal or was it on an empty stomach? I can't remember if that would make a difference or not.

Hope your pooch is feeling better!