ca, I read a post in another section of the forum a few months ago of someone who hung their feeder and they went out at night and found that the mice were on the feed dispensing area. They didn't know how they were getting up there. I also used to hang my feeder like that inside the coop and still would if I could. My situation is such that I couldn't keep sparrows out of the coop with the feed inside. I had covered all holes that a sparrow could get through in the coop with hardware cloth, but the darn things went straight through my shade cloth curtain that covered the pop door. So I had to remove the feed from the coop. I use baled alfalfa, not fresh.
When we started down the organic route (originally suggested by my oncologist) we paid close attention to the "dirty dozen" or the "dirty thirteen" fruits and vegetables. Those are apparently the ones with the greatest amounts of chemicals in the parts consumed. Yes, I agree, happy food is good food.
DM, I've read a lot about capsaicin (hot ingredient in chili peppers) preventing anything with fur from eating your chicken feed and it also being a good deterrant. It makes perfect sense to me, they experience "hotness" much like we do. It certainly sounds like it's working for you.
mydog8it, you've got some big gophers over there! Ground chili pepper perhaps?