These are tuff.
My 15 month old German Shepherd has been making toothbrushes look like they have been through a garbage disposal since I started brushing his teeth at 2 1/2 months. I was looking for something better than a regular toothbrush (the three head brushes are very weak and he bit the head off of one in about 10 seconds) so I tried these silicone finger items. They are pretty good. They have four different surfaces, stay on my larger fingers well and he goes easy on the chewing when my finger is in his mouth. I have not seen any damage to the product though I have only been using it for four days, but it does seem strong.
Rating: 5 stars