When to breed Dwarf X goat

[Bubblingbrooks]

Our nearly 3 month old doeling is half LaMancha and half Nigerian Dwarf.
Any ideas on what size she needs to be for breeding late this fall?
She has the stocky traits of an ND for sure, but she is not what I would call small by any means!
I have read that standard breeds should be about 70-80 pounds.

 

[Javamama]

I've heard anywhere from 8-12 months old. The best advice I read was 'when she no longer looks and acts like a kid' - meaning, when she has filled out and takes on a mature look, her hips widen, they start finding thier place in the herd, etc. That's how I'm going to have to judge mine for readiness.