Got a hole in the top of my brick columns on my front porch. The squirrel nests inside it. But the problem is it eats the wood on my porch, maybe for its nest. I thought I shot them all last year (3) but evidently not. After I fixed the house they are back and chewing again. I live in a subdivision so dynamite, fire, etc is ruled out. Any thing for poison? They definitely don’t like Clorox cause I dumped some down the hole and they squeal but surprisingly I haven’t seen any white squirrels. I believe the column is made of cinder blocks and covered in brick and the hole is the cinder block itself. I’ve of course tried covering the hole. They eat any covering that I can get up there to attach. Here is a pic.