Poodle

The benchmark for an allergy-conscious household, and the only breed here in three sizes: Toy, Miniature and Standard share one tightly curled single coat that sheds very little and holds loose hair until it is brushed out. That coat never stops growing, so budget for a professional clip every four to six weeks and brushing several times a week to stop curls matting at the skin. Standards suit active homes with room to run; Toys suit flats but are fragile around small children.