
My advice would be to contact the breeder and owner of her dire for advice. Leos are a fairly new breed to this country, and do not have a huge gene pool. Therefore it is even more essential to mate together animals that complement each other, and as far as possible do not carry the same faults, especially ones of health or temperament.
The breeder and stud owner will know generations of stock behind your bitch with all their good and bad points, to them the list of names on the pedigree is shorthand for the flesh and blood creatures that are her ancestors, and they can see where certain traits have been passed on, for good or ill.