The only other plus side there would possibly be.... introducing a fresh bloodline into the gene pool.
Diluting out some of the possibly more inbred lines that may be about. But again, this is why you want to look for ethical breeders.


For a large scale breeder, taking a chance and adding some freshblood may be a great idea.... for a smaller scale breeder or just pet owners, this is just a pain in the butt really.