Other Horse & Pony Books:
THANKS TO DANDY
Reprinted in hardback by original publisher a few times.
SUMMARY: After their father is injured in a mining accident, Joe and Kitty are given the pit pony Dandy, and the family's fortunes begin to change.
Although not exactly a common title, can be found without too much trouble on the internet in the UK, USA and Australia. Price seems to vary a lot so shop around before buying an expensive copy.