Hi Jupiter
Hope everything went well and that pup and mum are doing well.
Just thought I would let you know my min pin was born a singleton as the others from the litter sadly passed in utero. There were no other pups to be raised with,just adult dogs and he is absolutely fine. He still learnt how to play and interact and there were no issues with too much milk that i am aware of. The breeder did an amazing job with him.
Wishing you all the best.