A horse that has too much belly is said to be what?

A horse that is described as having too much belly is referred to as "paunchy." This term specifically indicates an excessive amount of abdominal fat or a bloated appearance in the belly area. It is often associated with poor body condition or dietary issues, potentially leading to health concerns for the animal.

While the other terms may describe different characteristics or conformation types, they do not specifically relate to the excess belly fat or appearance. "Stocky" implies a solid, thickset build, often with a muscular appearance rather than an emphasis on the belly. "Bull-necked" describes a horse with a thick, muscular neck and does not pertain to belly size. "Barrel-shaped" refers to a horse with a round ribcage, which may suggest a broader body but is a more general term and does not directly address the issue of excessive belly size as specifically as "paunchy."