come in heat

come in(to) heat

and come in(to) season

[for a female animal] to enter into the breeding season. This animal will come into heat in the spring. When did your dog come in season?

Name	Pronounced	Usage
Tin	TEEN	Croatian
Graciano	grah-THYAH-no (Spanish), grah-SYAH-no (Latin American Spanish), grə-SYA-noo (Portuguese)	Spanish, Portuguese
Patrice (2)	-	English
Pekko	-	Finnish Mythology
Annice	AN-is	English
Dionisie	-	Romanian