A couple weeks ago, a friend gave us 5 chicks from her order of 15 and said they were "Buffs". I'm guessing they are 3 weeks old? We have a couple Buff Orpingtons and assumed that these were also but now that their feathers are coming in I'm not so sure. They also seem to have a different temperment than our Buffs had at this age. These little ones really seem to be more chatty and flighty. What breed are these?