I have some chicks here (all supposed to be pullets) that are about 8 to 10 weeks old. There are fairly friendly but I have noticed in the past few days, one of my ameracauna chicks rushes the door when I put feed in and starts pecking at my hands and arms rather than going for the food. Is this normal? She doesn't bother my 2 year old son at all when he visits them. Any ideas?