Yes, you heard false information. As luvofallhorses and Irescue said, it is spaying her before her first heat that reduces the chance for cancers by a lot. Second of all, we would like to see pictures because it is unadvisable and unwise to breed unless both bitch and stud have been tested and cleared on all health tests and that they are proven good examples of their breed both in temperment and conformation. You should also start evaluating potential puppy owners now if you already haven't and also start to write up a contract insisting that the puppy is spayed before the first heat cycle or neutered at approximatley 12 weeks of age.