We've had 6 different pets since we got our first chickens. 3 dogs and 3 cats. Each animal has a different personality and therefore a different way of reacting to chicks or chickens. Take Anastasia Bug for example. (she's the calico in the picture) Bug will sniff a chick if it's near her, but mostly she just ignores it. I have numerous pictures of her with chicks and ducklings. Sometimes they even snuggle up to her for a nap. She couldn't care less! We had a Siamese mix named Maggie that was curious about the chicks, but would never do more then pat them a little with a soft paw. Then there's the cat we got after Maggie died. Trixie. She's a Bengal. High prey drive. We have to keep her completely away from the chicks or they would be no more! She has even figured out how to open the sliding glass door to get outside and chase full grown guineas! Bad Trixie!
So as you can see, each animal has a different reaction to the chicks/chickens. Cat's however, aren't as easily trained as dogs.
We have 3 dogs. 2 were full grown when we got the chickens. The third one came to us when she was about 8 months old. One of the older dogs is a Jack Russell terrier. She can not be trusted around chicks! However, she's scared to death of them once they hit about 6-8 weeks of age. I guess they get too big for her. No amount of training has helped with her, she see's a chick and tries to pick it up. Bear is a Shiba Inu and it's in his temperament to be gentle. He just ignores all the poultry. Except the geese. If the geese are sitting by the back door he stands there paitiently and waits for me to shoo them away before he'll walk out.
Our other dog is a boxer/Australian shepherd mix. We got our first chicks and guineas when she was about 10 months old. She's grown up with them and is pretty good with them. Occasionally she'll run through a pack of guineas just to see them fly, but she would never hurt them! She takes pride in chasing away the chipmunks and squirrels that come into the yard to steal any scratch the chickens might have missed. She starts freaking out and ringing the bells to go outside any time the guineas send out their "alarm". She's even trapped an opossum that was trying to get into the coop, and held it there till I came out to deal with it! She's also been known to run past her electric fence line (ouch) to chase away a predator she sees in the woods. She's a great guard dog and loves just hanging out by the chickens.
As you can see, each animal that we've had has a different reaction to the chicks/chickens. I think some of it's genetic. Some of it is training. So my question for you is....do your pets and chickens get along?