I have a male doing that now. He's six months old, I produced him, he has been in the same tub for the past few months so no shipping stress, etc. Sometimes he'll eat after the second rewarming, other times he doesn't. One brother from the same clutch is also backing off feeding, while the girls are still taking everything I put in front of them. I'm pushing the boys out to 10 days between feedings instead of 7 to see if that makes a difference.