I know this is a bit random, but I kid you not my Anaconda did not like to eat off anything except for me holding the food by the tail. When I would put something that I killed or either F/T(depending on what I had at the time) in for her, she would just look at it then look at me. I would have to get it, hold it by the tail in front of her and she would come up, grab it by the head then would lay down and swallow it(wouldn't constrict it). Then I was like, omg, be yourself already, so I started to wiggle it around while holding it and then I got her to strike at it, but she would lazily throw the coils around it, then one time I just knocked the rat out and it went to move and she threw them coils, and that was it from then on. I'd just knock the rat out then dangle it in front of her.