Please just have patience with your little one. He is only 5 months old and he is already on his 3rd home.
It is going to take some time before he realizes you aren't going to dump him. These little critters are very sensitive and with love and affection he will eventually bond with you but 2 weeks is just not enough time. There is no telling what happened at the home that bought him from the breeder and I have never heard that excuse before "returned because he didn't act like a puppy". In rescue we always call this the honeymoon phase (they usually act very good) and eventually their own personalities will start coming out. At 5 months he is not set in his way but I am sure he is not very trusting of people. For all you know when he was called by the other people it was to have his nose pushed in his accidents. When a new rescue comes in I always have treats in my pocket and reward them for just about anything. When I give them the treat I use the word, cookie so they learn when I say the word cookie to come running. Just enjoy and love him and give him all the special attention you can and hopefully one day you will write, "Help me My Dude is a Holy Terror"
