The ztraps are not true dog proofs. Because they are push pull. A lot of guys like em.... I use strictly pull style because of non target catches. Coon, skunks and possum are ball able to trigger a pull style trap.... so it is irrelevant with those species. I have seen many pics of guys with fox in their ztraps.. which is good, unless our trapping for a land owner with a small dog. Haha .. I kicked around buying some but didn't... good traps though. Cats get caught in the pull type just as easy though. They get their claws under the lever and pull up. I've caught a few like that this year.