What breed and gender Is this checken

[Pelagio2122]

 

[fluffycrow]

Possibly leghorn. Looks a little more heavy bodied than I'd expect from a leghron, but a white rock would have red earlobes; this one doesn't

How old is it, and where did you get it?

 

[KirstyS]

No expert, but Looks like a female White Leghorn. She should lay some white eggs for you if she’s not already. Looks like my girl Charlie.