Does anyone out there use the Kongs? If so, do you stuff them? I have been pluggin the little hole on top with peanut butter, then filling the Kong with water and bouillion (chicken or beef). Then I plug the big hole with peanut butter and freeze. My puppies love them!!! However, lately I have been wondering if these ingredients are good for them because they don't seem to be eating much of their regular food. Maybe I should just give less often? I was doing this almost everyday. Any advice? Thanks.