We have a 4 year old F3 Male Savannah named Zeus. We have had him sine 10 weeks of age. He has always appeared to have food allergies so he is only able to eat Royal Canin HP dry food from his vet. Lately he hasn t wanted to eat his food (dry kibble) we thought he had a sore tooth but upon further exam by the vet discovered his throat and very back roof of his mouth is very inflamed and raw. all he wants to eat is deli black forest ham and has lost 3 lbs in 3 weeks. he has been on depo injections whish is anti inflammatory for a year for his food allergy symptoms but this is no longer working for him. I am heartbroken that he may die. please help. My vet does not know what to do either