Question: what are the symptoms of a cat on heat?
Answer: She is more vocal than normal. Also known as “calling,” your cat may wail, moan or meow more than usual while she is in heat. ... 
She's restless. ... 
A low crawl. ... 
Extra affection. ... 
Excessive grooming. ... 
Your indoor cat wants to be outside. ... 
Her tail tells a tale.