
If your post is to be taken on face value, and your pup is 5 1/2 months old, then you wshould not be contemplating mating her in the next few months, which I assume witll be her first season.
It is accepted in most breeds that the earliest to breed a litter from a bitch is two years old, with perhaps a minimum of 18 months for the small fast maturing breeds.
If she is 5 1/2 years old then she is too old for a first litter.
Also you will nedd to have her eye tested!