We are new to chickens and have chicks that are about a week old now and our dog is good with them right now, is there I turning point when I need to be extra watchful? Our dog Josie likes to look at them when we handle the chicks and she will sniff them but that's all she will do. If we aren't paying attention to the chicks she doesn't seem interested.
Some dogs, like mine, are scared of the chickens so they leave them alone. My dog is a poodle, (a natural bird hunter!) but instead of killing them, ignores them and runs from my ameracana who pecked him when she was a chick!! But, I wouldn't trust him to GAURD them because he might hurt them because he is afraid.