I think I might have some dead mouse trapped in the ceiling or wall of the house. After being away for a few days I found the house infested with flies when I came back, mostly coming from a hole in the ceiling which I covered but they still seem to be coming from somewhere else. Could you give me a quote on how much it would cost to try to find the dead mouse to eradicate the flies? I'm in a rented house, can't really afford to knock walls down. Thank you