baymule
Garden Master
How high can they jump? I remember a rat/mouse thread on BYH, where a bucket of water was placed next to something the rat/mouse could climb on and a board laid halfway across the bucket. Corn was put in the bucket, floating in the water and corn was placed on the end of the board, suspended over the water. When the rat/mouse crawled out to the end of the board, the added weight tipped the board and landed it in the water, where it drowned. I'll go see if I can find it.....
Others said they put lye in the runs and rats lick their feet and die, but that sure doesn't sound very organic to me.