Merrylegs is a fat gray pony owned by Miss Jessie and Miss Flora at Birtwick. He’s wise and old, at 12 years old, and has been at Birtwick for five years when Black Beauty arrives. Black Beauty quickly befriends the pony. Merrylegs makes a point to carefully care for and train his young riders, but he also believes that part of this is teaching visiting boys not to be cruel and abuse horses. So, when the boys beat him with sticks and try to make him gallop, Merrylegs ejects the boys to teach them not to do that. Dumping mean riders gently, though, is as much as Merrylegs is comfortable doing to make his point. Though Ginger suggests she’d kick cruel boys, Merrylegs believes he’d be sold into horrible work if he ever kicked, bit, or was anything but a gentle and reliable horse for children. When his friends discuss how cruel people can be to horses and dogs, Merrylegs doesn’t disagree—but he also suggests it’s inappropriate to talk about such things when they’re so well cared for at Birtwick. Squire Gordon sells Merrylegs to the vicar when he moves to Europe, on the condition that the vicar never sell Merrylegs and that Merrylegs should be humanely shot when he’s too old to work. Black Beauty never discovers whether this happened or not.