Some sentence examples which use the word 'mettlesome'
A judge of horses and a sportsman, he had lately procured himself a large, fine, mettlesome, Donets horse, dun-colored, with light mane and tail, and when he rode it no one could outgallop him.
He would even stifle a yawn while in Corrie's company, though he was a mettlesome and not a listless fellow.
Riding and driving came to him as naturally as breathing, and the fact that a steed was mettlesome did not daunt him.