盛りのついた
Meanings
1
expression, noun-modifying (irregular)
in heat; estrous
Fixed expression used for female animals in estrus. The phrase is a prenominal modifier, typically followed by a noun like 犬 (dog) or 猫 (cat).
See also: 盛り (さかり)
A cat in heat is meowing loudly in the middle of the night.
A dog in heat becomes restless.