How Long Does It Take A Dominique Chicken To Grow Out

[PoultryPower]

My sister just brought home a Japanese chick from the feed store, not what we wanted to have happen. Oh well. Now it needs some chicks to brood with and we want something that we can use. We like the Dominique chicken and the feed store is getting them in on Friday. My question, how long will we have to have these chickens for until they are ready for slaughter? Thanks