Actually, crossing two subspecies will produce an intergrade, not a hybrid....

No trickery needed-very easy. It is a practice which in most cases should be discouraged, IMO....
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Brad Chambers
WWW.HCU-TX.ORG

"I am free, no matter what rules surround me. If I find them tolerable, I tolerate them; if I find them too obnoxious, I break them. I am free because I know that I alone am morally responsible for everything I do." - Robert A. Heinlein