Feathering slow

[acw13]

All of my other Cochin chicks are feathering beautifully, but this one still has baby fuzz. Is it just a runt or what's the deal? I got them about 4 weeks or so ago.

 

[limited25]

Don't know but I had one smaller than the others, and it caught up after I put out another feeder (so there was more than one in the run) so no-one could prevent the lowest on the pecking order from eating.