I freeze them. Dogs have access for about 30mins when I give them, which is enough time for them to start to thaw making a mess- so I simply feed them on an old bed sheet (easily washable). Then I take them away and put them back in the freezer. For my adult, a cow knuckle will last two sessions before I toss it. My puppy has yet to experience this goodness...
Pimg - DOB: 2/06, CL3, CL2, CL1, UJJ, HIT, CGC
High Jinks vom Neuanfang - DOB 9/12 (Gotchya Day: 1/23/2013) agility superstar in training