My 7 years old min pin doesn't eat pet food - Question No. 3?

Hi there, my 7 years old min pin refuses to eat canned or dry commercial pet food. So I cook every day fresh chicken of beef for him. I feel guilty when I try to switch to commercial pet food because he can be 2-3 days without eating or. In the end, I give in with regular cooked meat. My vet told me to give him pet food while some other people I talked with said it's ok for a dog to eat only meat. I am very confused about the whole situation. I don't think he has a balanced diet, no fruit and no vegetable. I cook meat with bones in the pressure cooker, the bones become very well cooked, tender and chewy and I give him these bones to chew on, one at a time, he just loves these bones. The vet told me he was healthy. However, I am asking the experts reading this forum if in the end, Kooky will stay healthy with this diet and the way I feed him is ok. During the day, he doesn't drink or eat, only in the evening. Thank you for your reply.