Who's stealing animals? The "pet-tectives" are on the case!Horace Homer Higgins III is a most dignified Boston terrier, and he's not happy that his human Eleanor is moving him from the city to the Homestead. It's hard enough to keep her safe in town. Then she announces he's about to get a new sister…and that sister turns out to be a pig! Bunwinkle was the runt of her litter, but what she lacks in size she makes up for in enthusiasm, and she loves living on the farm. All the animal characters are, well, characters: Smith and Jones are horse brothers who've seen it all; Smokey is a sardonically nasty stray cat; there's also a bevy of excitable chicks, alpacas, goats, and troublesome ducks. On one of several trips to the vet (farms can be hazardous), Horace and Bunwinkle start to piece together a local mystery. Animals are disappearing. Is it the vets? Is it Smokey? Aliens? (That's what Jones thinks.) The chase is on, but can they puzzle it out before one of them gets snatched? Gardner's debut tale of mystery and (eventual) bucolic bliss brings to mind Joan Carris and Noah Z. Jones' Bed & Biscuit series. Graduates of the Mercy Watson books will also feel right at home. Mottram's occasional illustrations just add to the charm. Human characters are default White. (Final art not seen.)This kicks off a series, and readers will be glad to know that this piggie and pooch will pair up again. (author's note) (Fiction. 8-12)