A true story:
Anybody have a Red-Squirrell problem? Nasty and insistant little buggers! My neighbor had (still does) a very exspensive home, well the "Reds" decided they liked it too! They ate right through the wood shaker shingles and an entire clan took up residence in his attic, then the walls and finally into the house.
Moth balls I told him and after loading the attic up the entire house smelled of Moth Balls. Yes, it took care of the problem........for awhile! The Reds moved back in after less than a week so he went back to the attic and could not find a single one of the hundreds of Moth Balls he had spread around!
Went outside to the area that they would come into the house and he found this perfectly neat-stacked pile of Moth Balls laying on the ground! Seems they had carried everyone of those Moth Balls outside and put them in a single pile!
His new solution was to get on his roof, sit on the highest peak and everytime one of those Reds stuck his head up my neighbor would let em have it........with a .22 rifle shot! As far as I know he is still doing roof duty!
Not to worry, he built the house so I suppose he was capable of repairing any extra holes!
DV