From the book jacket:
"I'm right sorry to see her go," said Farmer Dakin to James Herriot, his vet. "She's stood in that stall for twelve years and given me thousands of gallons of milk." But Blossom the Cow was too old now for milking, and the farmer needed to make room for a younger animal. So, sadly, he was sending Blossom to market. At least, that's what he and the vet thought. But James Herriot continued on his rounds to Mrs. Pickering and her Basset hounds, he was about to find that Blossom had a surprise in store....