I have two little dogs - a 3 yr. old Morkie and an 18 mo. old Cavapoo - who love their toys but are serious chewers, so they destroy virtually everything literally within hours of introducing them. Sometimes within minutes! I no longer buy anything but your toys and would say that the Tux is the most durable. I would give it 5 stars, as we still have the original ones purchased months ago and they are totally intact. The Hurley at 3-4 stars was also a great choice but lasts about 3 weeks before they finally manage to start tearing it apart. The Būmi is good for very limited play time/chew time, as the dogs will chink off a chunk within days. So I'd still say it's a good toy, as they love playing with it together and tugging each other around the room. I just can't leave it out/must take it away after a half hour or so or else it'll be chewed to bits. But I'd give it 3 stars because it's still soft enough for them to tear up. The Tizzi was the least durable of the 4 - they were able to chew up the little tendrils or legs or whatever those things are within a day or so. I recommend your toys all the time - they've held up far longer than anything else we've ever bought.