I bought a pet sponge at PetsMart and the clerks were not familiar with it at all. There were maybe half a dozen sponges in stock. I hate to say it cuz I'm long and strong spng and I am afraid of inducing an angry mob here, but the soap in the sponge seems pretty thin and doesn't lather up much at all. I have not tried any other products - do the others give a better lather?