I took Rhiannon to roller disco tonight and read this month's copy of 'Your Dog'. One of the articles was '10 things you can make for your dog' and one was a doggy ice cream.
Mix a mashed banana, some runny honey with low fat vanilla yoghurt, pour into a plastic bowl and freeze. Or pop into the kong, plug with cream cheese or peanut butter and freeze...add slices of his/her favourite fruit for a bit of variety.
They do say that this can be a a messy treat and not to give it to your dog on a carpet...
I mix peanut butter and lowfat vanilla yoghurt and freeze it in kongs. They love it!