No pitbull shouldn't be mixed with another breed.
As I know, there is no rat face bloodline. Rumors include a rat terrier cross breed. I dont recomed cross breding a pitbull with no other dog breed.
I can recommend you to breed a pitbull and another pitbull. You see? Pitbulls have a estable behaviour and mixing with another would not make a better breed.
American pitbull terrier
The pitbull breed is a combination of the American Staffordshire Terrier and the American Pit Bull Terrier.
The breed is The American Pit Bull Terrier. Some people shorten the breed's name but it is the same thing.
The term "Pitbull" is often used as a general term to refer to a type of dog with certain physical characteristics, while "Pitbull Terrier" specifically refers to the American Pit Bull Terrier breed. So, a Pitbull could refer to any dog with similar traits, while a Pitbull Terrier is a specific breed.
A rat terrier is the breed. Smooth is the coat - Flat/ short. You can also get Wire. Its the same dog...
amstaff terrier and pitbull
There is only one pitbull breed. The names you hear are the bloodlines names within the breed. Dogo would refer to some bull breed names which the pitbull isn't related.
The American Pitbull Terrier is a specific breed recognized by the United Kennel Club, while "Pitbull" is a term often used to refer to various breeds with similar physical characteristics. The American Pitbull Terrier is known for its strength, loyalty, and intelligence, while the term "Pitbull" can encompass different breeds like the American Staffordshire Terrier and Staffordshire Bull Terrier.
She will clearly show you when she is ready and in heat.