They were “full grown”, but no chained dragon in the Dragon Pit was capable of growing to Drogon’s size. The dragons were already stunted when the Storming of the Dragon Pit occurred, and those dragons were chained up. They still killed many people, but it’s not comparable.

The Dance of the Dragons established that Targaryens choose male heirs over female. 

I’m in my second trimester and freakishly obsessed with my husband as a result of the hormones. Does Mylie have something she wants to share...?

Brienne was in Winterfell - she’s standing behind Sansa when Jon and Dany arrive.