These are a great way to exercise my dogs minds. I fill them with softened kibble and a few bits of cheese and pack the food in tight. Then they really get to work at getting all the food out!
We are a multi-pet household with regular foster cases and we needed something that withstands our requirements. The price is super and the bottle comes with a spray head, which is very handy. This is a new essential in our household now.
We are using Yaks regularly for both dogs and they always love it. Days of chewing fun, cause they can't be chewed up within minutes like other chews. Especially handy with the Yak holder!