depending on what type of ice cream depends on how bad it is for dogs. dairy alone is bad for dogs, but nothing 100%serious usually. chocolat is bad for dogs for many reasons. any type of sugar is bad for them, so the higher the sugar content, the worse, the ice cream is for them. and the last thing i can think of. penuts. penuts can be very deadly to dogs. it has to do w/ a gas causing agant in them. though many of us will argue "but i feed my dog penut butter all the time" that doesn't make it right. it hurt me so much when i took it out of their diets. so, penuts and peanut products are major no-no's. those are the only things i can think of.