My chickens are killing wild birds. I have a freeloading barn cat that I thought had started killing birds. I keep finding them in the yard. I haven't seen her run/move in quite some time so I didn't think it was her, but didn't have anyone else to blame. Today I saw it with my own eyes. A bird landed in our yard and my girls attacked! One let out battle cluck and one ran over direct and grabbed a wing. The other pullets came running and pecked it. I shooed them off of it but the bird was dead. Gross. I just put Sevin dust on my girls and added apple cider vinegar to the water. I have some Pyrantel and some Safeguard dewormer. I'll be reading up on dosage for them and doing that as well.