In last year's A Puppy For You, Hess applied herself to pet care and suggested that readers check some of the many existing books on breed selection. But it looks like she's decided since then to add to their number--or, to put it positively, to provide a juvenile alternative to the glossy picture albums. This includes one-paragraph descriptions, accompanied by black-and-white photos, of some thirty breeds, classified according to the American Kennel Club's six categories--sporting dogs, hounds, working dogs, etc. The distinctions she makes among them should be helpful, and though a great many of the breeds would seem to make ""ideal pets,"" she does point out which ones aren't suited to city life and which (German Shepherd) must be specially checked for unsound specimens resulting from indiscriminate breeding. In addition to the checklist, Hess puts in a word for the hardworking, expense-plagued kennel owner and gives readers an unofficial picture of the dog show scene--complete with vendors, artists, picnickers and, among the contestants, Afghans awaiting their events in snoods to preserve their three-hour grooming jobs. Handy and personable.