My birds have eaten a TON of tomatoes this year. I put out 75 tomato plants this year and I process a lot of them for spaghetti sauce, salsa and chili starter. The chickens get all of the scraps when I am done processing them. Also, when I am picking any that are beginning to rot or have been partially eaten by bugs get tossed out to the birds when they are free ranging. They have learned to wait for the tomatoes to come flying out of the garden when I am picking and they immediately jump on them and when I bring out the bucket after processing a batch they go crazy. As far as the poop goes, I have not noticed a change but then again I don't really look for it.
Chris