Ladybug: I have a very nice mixed flock that I ordered from MyPetChicken. I added partridge Plymouth rocks and barred rocks from MyPetChicken . They are very very healthy and congenial. They are 16 weeks old. I ordered 5 hens, but one of the partridge rocks has turned out to be a rooster. But I am glad to have this beautiful rooster. Plan to breed partridge rocks in the Spring. I only keep cold- hearty birds.