Well, I can't say I have a problem with wildlife trying to tip it over, but I've moved mine around several times using the lid handle and it does not feel like its going to tip at all. Its over 600 pounds and seems very stable when I'm rolling in and out of my patio, as far as its center of gravity. But I bet someone else will have an even better answer than I. Sorry I can't be of more help. Just my 2 cents.