From what I can remember they tasted a bit like rabbit.Yea, quail are like that...pretty much breast only.
I've heard rat is a bit greasy, but maybe it depends on what they eat.
Given this lot eat pretty much what the chickens eat; much to my annoyance, I expect they'll taste a bit like chicken. They're country rats, it's not like they live in city sewers. The few I've killed looked disgustingly healthy.
