Please do as much research as possible, starting with reading the thread, Things to Look for in a Reputable Breeder
A red flag I see when I look at the website for Cahawba Havanese is that there is no mention of health testing.
Breeders' websites may say, "My dogs are health tested" or "My vet has thoroughly checked them over" and yet there is little or no health testing documented at offa.org. In this situation, the dogs are probably NOT health tested. A lot of back yard breeders (BYB) love their dogs, but are usually not breeding to help better the breed, and they typically do not complete health testing that is submitted into the OFA
database; they believe that health testing consists of taking their dogs to the vet for a routine checkup, which is NOT health testing!
* A reputable Havanese breeder will conduct and can provide proof of the following health tests on their breeding animals and will also require them of the sire (father) should they "hire" a stud dog for the litter:
CERF (eyes) yearly
OFA (for hip displasia & Elbows), a onetime deal done at or after age 2
Patella (Knees) done at or after age 1
Cardiac (Heart) done at or after age 1
And beware of breeders who scoff at genetic testing and say their particular breed/line is problem-free.