it's quite interesting and fascinating to watch your dog try to get the treats out of the pockets. the first few times, it took longer, but he has now mastered the roller. i have a 12 lb dog so this was the perfect size. i was initially afraid he would rip through the pockets, but so far, the roller is still in perfect condition, minus the saliva stains. i have to toss it in the washer pretty frequently and i hope it lasts. my dog loves it though! i also used it to feed him his antibiotics. i placed one pill in the pocket along with treats in the other and he just automatically assumed it was a treat and ate it without an issue. i would highly recommend this roller. i am thinking about getting the other models too once he starts to get bored.