I have 12 chicks 10 are 4 wks old and 2 are 6 wks. old. Only one is friendly. All the others are skittish. I can go into the run or coop and they're fine, but if I try to pick them up or pet them they run away. Today I sat in the run on a low chair and waited until they came near me. One of the barred rocks 4 wks old let me pick her up and hold her, then when I put her down she turned around and bit me. Not really hard, but it wasn't a peck, it was a bite and she did it twice. I'm worried I haven't spent enough time with the chicks since they've been in the coop since they were two weeks old. Any suggestions? Should I just let them do their own thing or should I pick them up and hold them until they get used to be handled? My husband keeps telling me they're chickens not pets, but I'm worried that if they get sick or hurt I won't be able to pick them up to help them.