My Pugs love this!
I bought two of these for my Pug puppies. Wasn't sure if first if they would get the hang of it but it took no time at all. Instead of the treats they suggest (which could be made of anything and could have too many calories), I fill these with Cheerio's (or some frozen sliced carrrots or peas) and a few larger milkbones and they go nuts. The larger milkbones are added just to make it a little tougher. It's a great learning toy or busy toy - hence the name. All I have to ask my little Puggies is, "do you want your bottle" and that's all they need. We couldn't live without it. Oh and I've had ours for probably a year and a half and we're not even close to needing to replace them.

Broke
This did not last 15 seconds with our dog. Chewed the piece that inserts into the bottle.

DO NOT BUY!!!

tricky, but not holding our beagle's interest
So far, this is the one toy that our beagle hasn't defeated, but she's also given up trying.

One, you need really small treats to fit through the neck of the bottle. They give you little liver treats, but I haven't been able to find anything small enough in a store.

Two, the vents are on the bottom, so our dog is digging at the wrong end. They are supposed to pull on the rope to get the treats out, but she's trying to get at them through the vents.

We will keep trying with different treats, but I'm not sure I can get the dog interested again.

This thing is amazing!
For the first couple of days, our dog Moby was only slightly interested in the tug-a-jug. We kept it out, though, and when he finally figured out his own system of getting dog food out of the jug, he was hooked! Then we started putting all his meals in the jug instead of in his bowl. Since starting his meals in the jug, Moby has an outlet for his curious energy and he spends less time in the trash can and in distructive activities like toilet paper shredding because he has to work physically and mentally for his meals like animals do in the wild. It also occupies him while we aren't at home. It lasts so much longer than a kong, because you can put a whole meal in it. This is also great because you don't have to feel guilty about giving your dog too many unhealthy treats -- dog food in the jug works great because the kibble is the perfect size.

I was watching the video of the woman who put in a negative review, and as an amateur dog trainer, I think I know why. If you help your dog get food out of the jug, they quickly learn that the way to get food out of the jug is to bring it to the owner, so don't help your dog -- that ruins the fun of the toy! Also, it's harder to get treats out of the toy if it isn't somewhat full, so just fill it up with dog food and a few treats in the beginning so it's not so difficult that the dog looses interest. It also helps to put a few treats in the jug so they randomly hit a jackpot when playing with it. As someone who's studied animal behavior, I know random rewards are the most powerful way to get an animal addicted to a behavior!

In short, I can't say enough about this toy!

Fun for the whole family ...
We've had this for almost a week, and the dog still hasn't figured out how the treats fall out. I think this toy is worth the money just to hear my kids and husband laugh at the dog as she tries to get the treats out. So far the toy doesn't show any signs of wear, and our dog is a real chewer of everything she finds.