We have our feeders hanging from rafters also, but I have some very small chickens, so they have to hang just a few inches off the ground in order for my little ones to reach the feed. Unfortunately the rats have no problem reaching the feed either.
There is a rat problem in our neighborhood, which makes it especially difficult to control them. They even ate my dried peppers that I had hanging in the porch.
Our house looks awfull, because we had to bring everything inside, that the rats might get into. So we have grain, corn, luffa, dried peppers, millet, pumkins, herbs etc all over the living room and dining room. We grow a lot of feed for the animals ourselves and it is stored in the house, until we can get metal or glass containers for everything.