I don't know about dogs but I do know that two of my cats always loved ice cream, especially chocolate and vanilla. Actually, Rainbow also loved yogurt and cottage cheese. Anyway, now there's a "safe" ice cream for dogs coming out. From Yahoo/AP:
Ice cream maker Good Humor and pet food producer Pedigree have announced plans to produce ice cream sandwiches for dogs. Many dogs are lactose intolerant and cannot eat ice cream, the companies said.Pedigree Ice Cream Sandwich Treats for Dogs will be dairy-based and have the same texture as ice cream, but contain only 1 percent lactose.
The treats also will have added protein and no sugar. The companies plan to sell packages of 24 frozen treats for $3.99.
Milk products and chocolat can be harmful.
I had a vet tell me its hard on their kidneys.