you have a 15 day guarantee on them from Petco so I would contact them tomorrow and they will arrange for you to take them to their vet at their cost for a checkup. I don't know how they ended up with them, but it was like the surprise of the rally here. I can't wait to see what they turn out like and I will ask for info and will let you know what I can find out, the manager at the one here is a dear friend so I will see what she knows. I know out of 6 in this area they all had them which was a surprise.