I've never given Ruby any milk or cheese, but I sometimes put nonfat plain yogurt in a Kong treat and freeze it. She LOVES it! As far as any other dairy is concerned, I've just never really thought she needed it. She's only gotten shredded cheese if it falls on the floor and the little scavenger licks it up. She's got a pretty sensitive digestive system, but she's never had problems with the yogurt. In fact, my vet said it is probably good for her system. She only had problems with animal=fat products, which I found out the hard way when I gave her a bully stick....NOT a pretty sight.
Jessica, mom to Ruby, 1 yr. old blenheim