How to breed lots of Roostros?

briar chickadoo breeds tons of rostaroos also stony chicadoo is slightly better then normal chicadoo but brair is the best

I don't think there is a way to really breed Roostros more effectively. There isn't a 100% chance that a Roostro will make another Roostro in it's lifetime. I'd recommend 2-3 roostros in a coop with 3-4 more hens of your choice. You should definitely trade with Mochi Miles so she invites you to her Ranch. You can then get a better coop and hold double the amount of hens if you take up the deal she offers you on her ranch.

My favorite way of getti g roostoro is finding a bunch in the wild and throwing them into a chicken cloner. It wont clone it everytime and theres even a chance you wont get anything out of it but it clones most of the time. To get the chicken cloner recipe you need to complete viktor humphries tasks in the simulation.