Help. I keep my cats on my screened in porch. Raccoons figured out there is food there and they ripped screen off of the door and keep eating cats food. I keep on a bright light at night and beer bottles inside the door where the 'coons get in, but it seems they are coming in during the day. I have to let the cats off the porch during the day and let my dogs outside to pee. What can I place around the porch to keep them away?