You should assume that any and all info your PET STORE gave you is inaccurate...don't breed a pup from a petshop/puppymill/broker/greeder etc., just don't...I'm sorry.
Stiick around YT and read up about becoming a breeder if thats what you want. You really need to educate yourself and it is a looong process....take your time and do the right thing...you are not ready yet...
Oh and welcome to YT, share some pics of your little guy....folks around here love pics!!!