It's possible to sex pigs within a couple weeks after birth... they can mate at 3 weeks, so it's actually really important to be able to sex babies a few weeks after birth! So I would chalk this up to the pet store not knowing what they're doing, not that it's too soon!Yes, big relief it's two boys! That was a bit stressful, whew!They must've been so young it was hard to tell. Thanks for the help!