my austrailian shepherd used to like to chase them for fun if hed get the chance but not hurt them-he does the same thing with my cats. he would sometimes heard the chicks into their brooder if they got out. well the other day i went down stairs and i had 6 younger chicks 2-4 weeks old. And I could only find one for about an hour and it was soaked with saliva and petrified!! poor baby. Hes fine now, just took him about an hour to get over the shock. About an hour later I found the other 5 stuck between the wall and the brooder. He didnt injure any of them he just wants someone to play with (he is now an only dog). But, still, you cant trust any of them. Hes supposed to be a herding breed too and good with livestock. But, then again hearding breeds like to chase anything that moves!