Kong stuff, the dogs love it
I have been using it to fill the small kong, then I freeze them, get them out when I go out for a while. Keeps the four of them busy. I also put a bit on a syringe when one of my dogs was ill, helped him to take all his meds.
It is pricy for the amount of kongs you can fill from one bottle. I did buy a few from zooplus as the best price was here.