I have four raised gardens overgrown with the larger species of ragweed (~12' tall) we have here. It is largely defoliated although the chicken still in there most of day. Six male Red-winged Black Birds are getting down very close to the chickens for much of the day while the latter are loafing. I think the black birds are counting on additional protection provided from Coopers Hawks by the much larger chickens. The chickens are using the cover more as hawks migrating over a lot lately.