After sealing the floor better to adding a pile of mouse traps into the greenhouse… the mice are still there.
We discovered some of the little plants starting to come up had been chewed down (Bachelor buttons and the lettuce). Nasty. So either the rabbits found a way in or they are in kahoots with the mice.

So the seedlings have come into the house for now and the cats have firm instructions to take out any mice that may follow the plants in. Later this summer we’ll take another swing at mouse proofing the greenhouse, and putting insulation on the north side wall.