My other sister has dongs and chicken as well as cats too! The chickens rule the roost (! sorry about that ... ) and (dog) Hector, (called Hector the Protector, because he really does look after all the other animals) adores the chickens. When I last went up there the chickens had gone away for a 'holiday' with a local farmer, because although I and my mother would have looked after them, the boys couldn't be trusted to do everything needed. Hector would sit and look at the chicken run, from on top of the sofa, and although we told him that they'd be back, he didn't really understand. Odd, that.
But the chickens are boss, then the cats, then the dogs. Isn't it fun how animals living together in a home all get on like this, Woodkitten?
I have to admit that all the animals here are terrified of the chickens. Which is particually amusing given that i have three bantums who are the size of pigeons. Your sisters dog sounds lovely regretfully my lady won't have anything to do with the chickens and won't even go out into the backgarden when they are free ranging because she gets so scared.
It's certainly interesting that the smallest animals rule the household (excluding the guinea pigs who just rule over the people)