Our 4-year old Beagle is scratching and rubbing his mouth and nose area raw and we're not sure why. We just changed his flea/heartworm medicine to Sentinel last month, and we're wondering if that may be causing a rash or irritating his skin. Have you ever heard of any side effects like this from dogs who are given Sentinel? Thank you!
No, I have never heard of this but I recommend that you bring you pet to the vet and try a different heartworm medication as a trial. Thanks, vetcare