My 2.5 year old snake hasn't ate since December 15th. He was injured and is now recovered but won't eat still. He ate f/t sm/med rats before this. Since he got hurt he's lost a lot of weight and is borderline size for a small rat or a large mouse. The size difference between those two is huge. I've been offering large mice and he's shown interest but won't strike. I'm going to try live, do I get a large mouse? Small rat? Try f/t again? I know he's recovering and in his "hunger strike" months but I don't remember the past years it being this long and I worry.