I got my first guinea pig, Kestrel, from Petsmart. There aren't any breeders or rescues who have guinea pigs near our home, and it was kinda the easiest way to obtain a piggie at the time. One of the biology teachers at my school had three guinea pigs as class pets, and while she insisted they were all females...one was male. So she ended up with two litters of four babies, and I got my Freckles from her about three months ago. I've literally known her for her whole piggie life lol. But my Petsmart piggie was the right gender and wasn't sick at all. I've had her for three years now and she's never had any problems, behavioral or or otherwise.