How the fuck do these things work?
Everyone keeps telling me they keep dogs entertained for hours, but my pupper played with it for a few minutes and just moved on.
It takes the dog a longer time to get through to the peanut butter. Keep in mind peanut butter doesn't freeze like water does, but even if it does, it would still melt assuming it was above freezing
They actually make specific treats that are shaped so you can put them in but they don't come out easily. So the dog will spend a lot of time trying to get the treat out. You can use regular dog biscuits as well. I have even seen at the pet store an "easy squeese" type can of peanutbutter or liver flavored stuff specifically for Kong balls. But I wouldnt trust that chemical shit for my dog, myself.