What is a group of Colts called?

A group of colts is commonly called a Rag. Other collective nouns you may see include Rake and Piddle.

Collective nouns for colts, which are young male horses, are used to describe a group of these energetic and spirited animals. One such collective noun is a "stampede" of colts. This term vividly captures the image of a group of lively and quick-running colts thundering across an open field, their hooves kicking up dust as they playfully race and chase one another. The word "stampede" conveys both the sense of movement and the wild, untamed nature of these young horses. Another collective noun for colts is a "playground" of colts. This term portrays the colts as excitable animals engaging in endless bouts of play, using their sharp instincts and boundless energy to engage in races, jumping, and playful interactions. The notion of a playground conjures an image of a joyous and lively environment where the colts explore their surroundings, learn from one another, and develop the physical and social skills crucial for their development. Lastly, a "gallop" of colts is also used as a collective noun. This term reflects the spirited nature of the young horses, emphasizing their agility and their inclination to move swiftly. A gallop brings about images of unleashed power, with the colts eagerly darting and racing across the landscape, their manes and tails flowing freely in the wind as they navigate their surroundings with breathtaking grace and vigor. These collective nouns evoke a sense of awe and admiration for these young horses, capturing their dynamic nature and illustrating the unbridled energy that defines their youth.