All these good ideas just gave me another one, especially for summer. Pumpkins are squash family members. When gardens overflow with zucchini one can shred it, then cook it in broth or with a little bone marrow or grated cheese, then save for stuffing bones and kongs. Maybe as mini cubes of squash in the freezer? I don't think the Labs will mind those giant zucchinis if the filling is meat flavored. Me, I like the little ones!

I just toss the Kongs in the dishwasher with all the bowls