I like to paint bird houses and hang them outside, I can't hang them my dad has to so I only have one hanging up since he has not had the time to put up my other two finished ones (which is weird since one was finished Christmas and the other a few months before that). The one that is up has residents, some sparrows. I went out to put out the cat's hair for birds to build nests and I noticed the bottom is starting to fall off. Through the piece peeling off I can see there is a nest and I would be devastated if it fell off and babies or eggs were in it and died. Is there anything I can do to stop the process or the bottom coming loose without taking down the house (in case there are eggs in it already)? Also how can I prevent this from happening to the other houses?