What canine Have Retained infant enamel? Some breeds of dogs are predisposed to retaining toddler enamel but it can occur to any younger Canine. Brachycephalic or smushed-deal with canines like pugs, Shih-tzus, and bulldogs together with smaller breeds like chihuahuas and Pomeranians are more likely to have toddler enamel that don't need to depart.