These are all good ideas. I saw a solar animal repeller advertised on TV and was ready to sneer at it, when I saw that it was put out by Bell & Howell. I might check into it. Thirty bucks.

I like the pepper idea. I hesitate to use ammonia or the stuff you buy and sprinkle...if one of the dogs ever got sick, my neighbor would ALWAYS think I poisoned her dog, and so would I, no doubt.