Chicken, turkey, extra lean ground beef, ham flakes, tuna, salmon, eggs... lots of options! Slow cooked in liquid will keep them moist and easier to digest.
I asked my dr just this question!! His answer was a simple one. Think of all your excess weight like a coat. You have taken off your coat!! I am 2.5 years post-op and no expert but I know that I am cold a lot still however I am finding it is not as often as this time last year. I honestly carry a hoodie or sweater every where I go now, I never use too. I have also chatted with many other rny/sleeve ppl who say the same thing, some are much farther out from surgery then I am and some have never gotten past the cold where others have adjusted. If you find you are cold and get in the shower to warm up put the plug in the tub and let the warm water pool at your feet it will help to warm your feet and get the blood moving. Cheers