The only thing to be careful of is that you don't bury it in any hard soil, like clay, and temperatures. I was going to buy one but found out my yard is pretty much clay and our temperature ranges fall outside of what "works" with it too often to make it worthwhile for myself. I only have two dogs though so it's not as hard for me hehe. I have heard they work great though as long as you are careful to use enough enzyme and make sure you put it in a well drained place.