I have a weird rat problem. I've been putting the food away at night for my chickens and Pekin ducks, but I have a few rats (younger ones) that come out in the daytime (they are pretty shielded back there and it's shady, and they're young). I have to let my ducks eat sometime, but I'd like to put something in the food that will bother the rats but not the ducks or chickens. Something like cayenne, or mint? Does anyone have experience with this? We are working on the larger rat eradication problem but trying to deal right now with the food sourcing issue.