On looking at their website, I see red flags. Paypal is not a good idea to buy a puppy from someone using Paypal. Also if you look on their About Us page they say they bring the puppies in the house to hand raise. Bring them in from where? Where are the mothers? They should be doing the raising.
There is nothing about sires and dams of puppies.
According to these ads
http://www.nextdaypets.com/directory...id/246109.aspx
they are selling these puppies from all appearances of the ads, at 8 weeks. That is too young. They also claim they will be 5 -6 lbs. There is no way they can say that with pups that age.
If you go to their guarantee page on their website they say they guarantee for congenital things up to a year. Nothing mentioned about genetic problems, no mention of a guarantee there.
My opinion is a big
