I have a 6 year old Retriever/Spaniel mix. He has been on phenobarbital for 3 years now due to cluster seizures that started when he turned 3. He hasn’t had any seizures in about 2 years but the vet (and myself) want him to stay on it just to be safe. He is now showing signs of joint pain in his hind legs. I’ve done the research but can’t come up with an answer as to whether or not it is ok to give him chewable glucosamine tablets while he is on the pheno. Any help would be appreciated!