I am sorry, but the obo thing really bothers me..So are you saying that whoever gives you the most money can have them no matter what type of person they are? Why are you selling them? Can you please post pictures. Also, $600 is alot of money for a 5yr old dog. Most people can get a puppy for that price. JMO!..How come you do not know their dates of birth? Have you had them since they were puppies?
