I would only carry one at a time, they need to be supported, if something startles them and they panicked you could easily drop them, better to be safe than sorry
Yes I can. And they are supported. One hand under both bums and one arm around them both. I have held three at once before but we weren't going very far at all. It's a lot harder with the lionheads though and I very rarely do it. If we are going outside to the run I will always use the carrier.
Excuse my hair...