Just got 2 piggies yesterday and they make a purring sound when you pet them what does that mean? They seem to sit still and just kinda sit there but they make this adorable purring sound kinda sounds like a frog! I can already tell their different personalities! One is a lil more skittish than the other but they are both far far FAR calmer than the petstore piggies i saw (got these babies from a lady who had 4-h pigges) Also they both look to have the same equiptment down below but im having a real hard time telling if we have 2 brothers or 2 sisters at this point they are about a month and a week old. Where as the piggies i looked at the pet store were young maybe a couple months but were distingishly males.