Chins teeth

Hi, I noticed my chin was not himself and not eating that much, this was a year ago. I took him to the vet and was diagnosed with diaphragmatic hernia. I was syringe feeding him critical care and he get metacam twice a day. But I noticed him eating his pellets. I wasn't too concerned about his eating habits. About a month ago I gave him apple sticks and he couldn't chew them. I took him to the vet yesterday and she said his incisors were a tad grown out but not enough to prevent him...

Chins teeth