I have a large litter of 2 week old pups. Have one that constantly suckles on her siblings bellys, vulvas & peepees. She has even gone right by mom and on to suckle someones belly? I have seen this happen on a rare occasion but not one pup all the time and for a more than a few minutes? She started doing it about 5 days ago. Mom has plenty of milk and everyone else seems happy. Anyone else experience this before?

I had a large litter of 11 one time and mom had lots of milk, but pups still wanted more and more suckling time. It happens. Once they were on puppy food they tended to stop sucking on one another.