The Zoo Balloons come in three different animals: an alligator, a lion, and a rhino. I don't name the animals individually when I'm talking about the toy to Elka. We've had far too fast a turnover in them for that, and there's no guarantee what will be in stock next. I just call it the squeaky toy.
They hold up fairly well to more than one session of chewing and stomping. Some of the time Elka could spend concentrating on damaging the toy is frequently spent on licking the squeak hole instead. I'm not really sure what's up with that, but I'll take it. They're made of a non-smelly rubber (or latex?) and then stuffed with some kind of semi solid white stuff not unlike memory foam, so it's got a fairly solid feel to it and bounces back well when released. Of course, once there are little holes in the latex, the white stuff starts coming out, and then it's garbage time for the squeaky toy.
Only once so far has she diverged from the regular course of squeaky toy destruction. She once lay there with the toy and chewed the rhino's leg off. She didn't consume the leg, just left it on the floor, but I noticed an inordinate amount of stuffing on the floor and came to take it away. I guess it's good she didn't chew the face off? I'm also very grateful that Elka never seems to consume any of the stuffing; she never has, whether it was her dog bed she was chewing apart, a stuffed toy, or these Hartz things.
So, I do continue to buy them, because as I said, they're fairly cheap (comparatively) and hold up well (enough) to Elka's maw. The squeak isn't even all that abrasive. Or, I've gotten accustomed to that kind of squeaking. Whichever.
(FTC disclosure: I was not compensated in any way for this product review.)