Chicken feed is not expensive.
It's still another dern bill. And I don't think the OP is getting bird seed donation.
I wouldn't kill the Dove's but that is just me. I was worried about disease transmission during our unusual snow and record cold earlier this year. The tractor had them waiting for us to open the door and was full of them all day. I'm not leaving the chickens cooped up all day and not locking them out either to keep the random sparrows...etc....... out.