The best bait to use would be 1 of the birds it killed if you haven't already disposed of them.I think I found where the critter got in. I built my run this winter when the ground was frozen. With the couple days of warm weather some of the ground under my door frame thawed and created a gap. I didn't see it until I went out a couple minutes ago and my serama roo was outside of the run. The hole will be fixed today and a trap will be set to catch the critter.