My chicks are about 11 weeks old and I'm just not happy with their body condition. They have lots of feed the stuff I give and the stuff that grows and crawls outside, and they never have an empty feeder. But many are thin they look healthy but when you pick some of them up you can feel their sharp breast bone. I don't think they are sick they eat, drink, and do normal chicken stuff, no signs of illness in them. So I'm concluding that they are either just growing too fast building their frame and will fill out later (they are standard Cochin) or they need to be wormed which I want to try since it probably won't hurt them even if they don't have worms. So what is a good dewormer for 11 week old standard Cochin, I've heard Cochin tend to reach point of lay rather late compared to many other chickens so I probably won't have to worry about meds in the eggs if I worm them at 12 weeks or sooner right? So to recap I'm looking for a "safe" wormer for a flock of standard Cochin and a few bantam Cochin for 11-12 week old chickens thanks.