have these for two dogs for years
As said have these for years and love them, the secret is do not put to small a treats in them as then they come out too fast, maybe just for the first time, read there were flimsey pieces of rubber inside that act as baffles well if the treats are to small they fall out. so use treats that fill in the visible hole size just about shake until they are past the three baffles on the inside, they will have fun getting them out if you make the sizes of the treats in variable sizes increases the fun.