I am thinking about getting a Calvier King Charles Spaniel

a. Would they do well in a crate?? :confused:

b.What would be better Male or Female?? :confused:

Nearly all dogs do well in a crate if they are not abused by the breeder and introduced to it early. See the sticky at https://www.askmehelpdesk.com/dogs/information-articles-our-dogs-expert-labman-53153.html#post251802

With a well bred dogs, you shouldn't have much trouble with either as long as they are spay/neutered. It is an act of folly for anybody except serious breeders to keep intact females. Males are far more likely to be troublesome if not neutered.

My family have a male cavalier and he has never used a crate he prefers to sleep in either a dog bed or someone's bed, hope this helps.