Yeah. The closest reasonable thing to encouragement is when they announce they've lost X pounds is asking them how long the next X or X times 2 pounds are going to take. Shitlord them when they bloat, shitlord them when they hold, and shitlord them when they're losing. Once they've made it to human size then you can encourage them to stay human and assist them into maintenance from active weightloss. Until then they can REEEEEE.