So we got our goldendoodle 2 weeks ago (8 old) and he did good the first day then he had bad diarrhea so we brought him to the get and they gave him an immune booster shot and 6 days of sulphur medication. He did good for a week then I brought him to the vet again for a check up and he wasn't running fever anymore and they said he was nice and healthy. Well I bought a flea pill for him and we gave him that and heart guard medication at the same time. This was on Friday. He still was doing well until Sunday then he got it again. Has anyone else had this problem with their dog?