Thanks for all the answers. Toby's problem apparently is not yet severe. He will be tested again in the New Year. However, the Vet thought that it might be best to adjust his diet and she recommended Royal Canin and Hills. He also has some dry food at the moment (Royal Canin Veterinary Diet Diabetes), but he rarely eats any of it. I have tried him on lots of food and in the past he has rejected the Hills one and most others. He eats a bit of Royal Canin Easy Weight, but he does not really like it. In the mornings he starts with Dine Pure Tuna Whitemeat. Fussy Cat have a can with Salmon, which he also eats. He seems to like fish better and he likes Applawse, the loins. Today he had roast chicken and he loved it. He will also eat some mince (best quality only). So far he prefers junks to Pate. I bought most recommended varieties in the past and he did not touch them. It is quite difficult and I am looking forward to all suggestions.