I have a chance to either acquire Two 1 year old sisters or Two 1.5 year old brothers. I do plan to breed them after couple years. Which pairs I should get first? I've heard introducing a new male to an existing female is harder than the other way around. I had a pair many years ago
which I had the male first then I bought a female companion for him after couple years. They got along very well. But I'm not sure if it would be the same if I bought in the female first, then male later. Any suggestions?
Thanks in advance.