By the way, the Pdf file also answers, What is a breeding female?
Quote:
Q. Under the final rule, what constitutes a breeding
female?
A. Only female animals with the capacity to breed are
considered “breeding females.” Females that an APHIS
inspector decides cannot breed due to age, infirmity,
illness, or other issues are not considered “breeding
females.”http://www.aphis.usda.gov/publicatio...final_rule.pdf |
So, as someone mentioned before if a dog can't be spayed due to illness, it would not count as a breeding female.