It has been warm enough the last few days that I had let the stove die out. That changed yesterday with the temps dipping into the 30s. My wife calls me and said she is going to light a fire...I walk in the door a few minutes later and walk over to check the stove and noticed that both the pipe probe and cat probe are 180 degrees out of position? I start to scold my wife for messing with them when she said she had not and then she proceed to tell me that upon lighting the fire a sparrow flew out into the room! lol She opened the front door and he flew outside...currently there is not a screen on the cap...but there will soon be.I didn't want to put mesh on the cap although I knew spring time will bring nesting birds and I just put it off...1/2 in mesh should work? I don't want to go to fine...