Quote Originally Posted by borzoimom
WRONG- if you return this pup to the mother- the mother will not recognize the pup as hers, in protection of her own- possibly get aggressive.
The best way to do this is to wait until until the pup is weaned, the others are weaned- then add- IF AND ONLY IF there is no sign of disease from the returned pup into the the litter..
It would depend on the circumstances and the bitch. In a case like this we can't assume the bitch will reject the puppy. Many wouldn't. It would be best for a puppy that young to at least give it a chance to rejoin the litter. I sure would.