Trace, the Schipperke watch dog here, will not molest the chickens unless he spots a particular item of leftover on the drive way, and even then he drives them away from it rather gingerly until he determines if it is worthy of his attention.
The two times a cat came through our wire, he was all over them.
Squirrels get his attention, too.
Foxes can’t stand him.
An officious little dog (22 pounds).