I bet they are tired. I love it though that they so willingly take other goslings to raise. I look forward to having some maybe next year when my goose will be 2yrs.They had stopped picking on the buff gosling and they are all in one pen but that gosling stays with the two baby ducks that I had in the brooder with. The two female adult buffs I have had took the whole flock of goslings from the Holderread's line- I think they are tired of raising babies. Lol