I just went out to give pigs in hutch some fresh food and 2 large slugs were in their dish of pellets and another fat one was squeezing through the wire mesh. I pulled it out. Yuk! I washed their slimy dishes and gave them fesh pellets. Every morning I wash slimy dishes. What can I do as they are revolting? The hutch is raised and the hutch hugger was down. Thanks