If they are different subspecies, I wouldn't try and mate them. How do you know, they are different subspecies anyway? X. laevis and X. borealis are individual species. Where did you get your xenopus? Hybridizing isn't recommended. Although it can happen sometimes naturally, a mutt frog isn't as preferred by many as a true breed. A cross that you sell off to people and don't know their heritage is rather unethical and rude. Every species, although looking similar, has its own demeanor and behavior. Behavior in species crosses can be unpredictable.
If you still are going to do it, its best to know the heritage of the animals and notify the people you will sell them to that they are at least potential hybrids.
I don't really think hormones is always the safest and most ethical way to breed frogs. Leave the dosage to lab people. Mating is best done by lowering the water level half full and raising the temperature a little higher for a few weeks, to simulate dry season. Keep them on a longer photoperiod during the summer and feed less. Then, you reduce the temperature and fill their tank with somewhat cooler water, to simulate cool rain rapidly filling the ponds.
pitcherplant7
2 x. laevis
2 b. orientalis
1 d. tinctorius
