The Bolds to the Rescue

The Bolds are a family of hyenas living as humans in a suburban house. But now their kindness to animal waifs and strays has become legendary - more and more animals keep turning up to stay! Roger the sheep flocks to their house, and Fifi the poodle turns up to learn some new tricks, whilst Sheila the crocodile decides to stay for a while.
But have the Bolds bitten off more they can chew when they take in a couple of race horses who are on the run?