Juice up the repartee a little, and this laconic sketch about a family's adoption of an uninvited cat could be a TV sitcom episode. Mother, of course, doesn't want the cat. The kids, naturally, have answers to her every objection (Jamey will have allergy injections, Timothy will put chicken-wire around the bird's cage), plus an extra comeback for added laughs: if Jamey had allergy shots, ""Then I'd never sneeze."" Timothy: ""What would you do when you had a cold."" Jamey: ""Give it to you."" And Dad comes around just when Mom, too, is weakening. It's snappy, off-hand, up-to-date--but not really designed for reading aloud, not really geared to the picture-book age, not really about the fate of a homeless cat but about who will win the family battle of wits.