Hi there this is my first reply in the forum, but I would like to say that i like the changes you have made to your birdroom the hole that the little critter used to enter the bird room was maybe created by them, the changes you have made should stop this happening again, the second thing is the way you have lined your avairy half way up to stop them climbing the wire great idea but it also serves another purpose and that is it stops any hask, seed or any other googies you feed the birds in the flight blowing through the wire and onto your lawn which would incourage mice to that area because it creates a good food supply for them. As all breeders know hygiene in the birdroom is very important for you and your birds but it is also important to carry this to the outside of the bird room as well. The changes you have made are excellent and you may have reduced or even eliminated the chance of the same thing happening again. fantastic and a good read also good photos. All the best.