Breyers are not British. They are a company that started in America over 50 years ago.
They were asked to make a horse for a clock and then people starting asking for just the horse. That is how the Breyer company was started.
They do make other animals
Bulls, dogs, cats, rabbits, pigs, sheep, donkeys, goats, deer and a Llama to name but a few.
Traditional 1/9th
Classic/Pony Gals/ 1/12th
Paddock Pals 1/24th
Stablemates 1/32th
Mini Whinnies (now called Micro Minis) 1/64th