Before the prespective owner even chose her new puppy she noticed the pup had a red and swollen anus > this ought to have been a clue that the pup may have had something wrong with her, this is just my opinion. The little pup may have been ill before being purchased, and sent to a new home. I also believe the pup needed to have been seen by a vet a lot sooner , because she was ill , however by the time she was seen her parvo symtoms were very severe, and she was too far gone to save her
how sad and devastating.
I also agree that the puppy was way too young to have been sold . At 7 weeks and only 1LB.
Poor little baby.