This is holding up to my power chewer's work so far! The opening is a great size for treats.

10/10 dog toy. I own an Australian shepherd puppy. He can chew through any treat toy to get the prize inside. This toy is indestructible and gives me a solid 30-40 min of play time. I didn't want the kong because I don't want to fill it with wet food and clean it every day. I stuff this toy with dried sweet potato and meat jerky and voila. I'll be purchasing more toys from this company.

Picture above shows this West Paw toy after 3 months of DAILY chewing. I can see there are many months left in this unit. It really keeps my 1 year old beagle "Doug" busy and not worrying about me when I'm busy myself with chores around the house. I was spending a lot on beef bones, which of course he loves but are really expensive here. I could have many of these Zogoflex with what I've already spent on bones. So it was worth every penny. I tried different fillings, but Doug could get them out too quickly as they would bust apart, commercial biscuits, etc.. I've settled on simmered beef heart that is about 1/4 inch thick x 1 and 1/4 inch square. I jam that into the hole and he is at it for hours at a time. Beef heart is cheap in most grocery stores and it's lean and good for your dog. I cook up a bunch of heart cut, cut it into squares and keep them in the freezer. Thaw a few out at a time that last a day or two of chewing. Cool toy/device .. somebody was thinking!! I'm going to pick up another one of these units soon.

Mon chien apprécie. ! Solide et sympa.

This is a great product that keeps the dogs busy for a little while. I filled with chicken broth with some kibble and a little baby food then put it in the freezer. The dogs love it and wait for the other to look away so they can steel it. I have put it in the dishwasher a few times and it has help up very well. I have 2 min pins and an Italian Greyhound that can pack it around no problem.