I also feed my new python frozen. When I got my bp it was only used to eating live pinkies, and this made it a challenge to feed it frozen/thawed for the first time. I finally had success by doing what DavidBeard said about thawing it in warm water, and then adding a little more kick right before the feed. Right before I give the rat pup to the bp I hold the rat pup under the heat lamp for about 30 seconds to get it really nice and warm. I then dangle the rat pup, and so far Pina just can’t resist! I’m not an expert by any measure, but if you have trouble getting your bp to eat frozen/thawed, then maybe try doing the water thing and then right before you feed it, throw it under the heat lamp for 30 seconds.