tongue-lolling

uncountable

protruding of the tongue from the mouth, usually about the horse

Japanese Meaning

馬などに見られる、口から舌が突き出した状態

The mare's tongue-lolling after the race worried the trainer.

レース後にその雌馬が舌をだらりと出しているのを見て調教師は心配した。

Sense（1）

protruding of the tongue from the mouth, usually about the horse

He says that tongue-lolling is not an unsoundness. It certainly is an unsoundness, not a disease.