I took my two boys to the vet for a checkup. I've had them both about 1.5 months and wanted to get them checked over, just to be safe. I found a vet in my area who is a Guinea Pig specialist. They both got 100% clean bills of health! (and they are definately boys- whew!) They were so well behaved, too. I was so proud of them. Everyone thought they were so adorable and just cooed over them!