What do you call a castrated male goat?

A castrated male goat is referred to as a wether. This term is specific to goats and is used to distinguish these castrated males from intact males and females. In livestock terminology, a wether is often raised for meat production, as they tend to have a milder temperament and can be easier to manage compared to intact males.

The other options pertain to different types of animals or are used in different contexts: a colt refers to a young male horse, a pullet is a young female chicken, and a gilt is a young female pig. Thus, "wether" is the correct term for a castrated male goat, highlighting the importance of precise terminology in animal science.