hi guys! i was just wondering if anyone could offer any insight about my cats fatness. personally, i consider him to be a big-boned cat, but someone said he was huge the other day and it is bothering me! he is an orange tabby named lemon, about 10 years old or so (not 100% sure about that), is about 17 inches long from nose to bum, and he weighs 15 pounds. do i need to take him to the vet?