I need to find a way to keep birds away from our house.?

My nieghbor has a hole in his roof he refuses to fix and there are at LEAST 6-10 birds living in there along with an occasional squirrel. I need these birds to stay away from my house as they are attacking my cat. I used to feed him on the porch and now I can't because the birds are thinking it is thier food and I am sick of it. My cat can't even sit on the porch without being bombarded by 2-3 birds. They are squaking like this is thier property. I want to keep them away!! Please help!!