First batch of chicks. Four weeks old. Would have had the run finished except hardware store didn't order the six foot chicken wire we requested and now it won't be in until Tuesday (two weeks late). We had one pecked to death yesterday and one that has a bloody butt. The box they are in is 3.5' by 8' and we are spending the morning putting up a temp. run 4' x 10' long and 3' feet high with half inch hardware cloth. We are concerned with one dog so we didn't want to put them outside the box until we knew the run was ready. We are thinking it is the space and the breed- Rhode Island Reds mixed with green egg layers and Golden Wyandotts. We spearated the badly injured one. Any other advice? Thanks.