My puppy got soooo excited when I pull out the groov woth peanut butter frozen onto it. I really really want to love this product, but unfortunately the rubber is way softer than we expected. I thought it would be similar to Kong material. As it is, my little 28 pound girl used it one time when I went out to rund errands, and I came back to find serious bite marks in it and she had pushed it out of the rungs of the crate. I can only imagine if she hadn't knocked the groov off the side of her crate, what could she have done to it. Now I know we can't safely use this product because goodness forbid she bites pieces off and chokes while in gone, or even swallows pieces and gets a blockage in her little tummy. If you create this in a tougher rubber in the future, I'll be back on the groov train. Please consider it!