[quote author=GSPmad link=topic=12504.msg242051#msg242051 date=1222094315]
Hinnys and ligers are infertile – but it doesn’t stop them being a hybrid – it just means they then can’t be mated – IYSWIM.
With small birds all hybreeds are infertile. Big birds like chickens are not. Actually don’t know why that’s so ??? .