I would ask the breeder I bought back a pug that I had sold to this couple. They found out that their son was allergic to cats and dogs so they were going to have to rehome her. So it might be and option for you.
Talk to your breeder first. Do you love your puppy, there are things you do for allergy that don't include medication. If you bethe weekly with a shampoo called Aller et it reduces dander, making allergy suffers less likley to have areaction.
A cat by any other name... is still a sneaky little furball who pukes on the sofa.
YOU most diffinately need to contact the breeder. If I were the breeder and you sold it without my consent, we would be going to court. Most responsible breeders have a strict policy regarding this. Even if you do not have a contract requiring this, giving the breeder first right of refusal is just common courtsey. And if they are not interested in taking the pup back, they would probably be able to help you find a suitable home.
He's your friend,your partner,your defender your dog.You are his life,his love,his leader. He will be yours faithful and true to the last beat of his heart.You owe it to him to worthy of such devotion