As the Misty pups get larger, she tends to lay on her back to give them access. Eventually she will feed them sitting up or standing up.
The pups are now weighed once a day vs twice. When they are younger, I weigh them every 12 hours to see if you have losses. If there are losses or issues you may have to syringe feed them one at a time every 2 hours. This has not occurred here. They are gaining over an ounce a day. So are the Sage pups.
The Sage pups are consistent in length but the Misty pups have shorter bodied and longer ones. They will vary in size.That's my guess from my experience.