I really feel for you. I have hundreds of holes in my backyard. I found out tonight at 10PM that my house is at water table level. Drainage Problem? I think not. I have spent over $1,000 each year for 3 years in tilling equipment, seed, fertilizer, etc. Still no grass. Someone came to my home 2 years ago, and said you have thousands of these. I thought he was talking about the bubbles, from the holes, after a light rain. He said crawdads. Nuts? NO. My dog found a 4 inch one tonight. Bate a wire cage at night with chicken or fish. Does it work? I'm gonna find out...Found it on a web site and I can't take this anymore...It's worth trying, as for other suggestions, owning your own sea food joint could bring in alot of money.