I have a welsummer hen that hatched her eggs 2 weeks ago. The eggs in the incubator hatched 1 week ago. The momma hen acted as if she wanted out of the pen that she and her 5 chicks were in, so I put ID bands on her and let her loose late friday evening and put up a heat lamp for her chicks. That led to putting the 20 one week old chicks from the brooder in with the 2 week old chicks with a heat lamp in the pen that the momma and chicks were in. So now there are 25 chicks in the pen. Momma hen on saturday morning was trying to break into the pen where the babies are. She was very, very upset that she could not get in with the chicks. So I let her back in. Short of the story is, how common is it for a hen to take over a brood of chicks that are not hers, and such a large number of them ? All seems well, the smallest ones are following her around this morning, learning from her. No injured chicks are visable. Last night they were all trying to get under her, so I turned the heat lamp on for them, I do not see how she could warm all of them. Heat lamp off this morning as it is about 90 degrees. Would you call this hen a good momma or not ?