The pups are so efficient at feeding, it only takes a few minutes for them to empty Cassonade's milk glands. There are 10 teets and 9 pups, so there is always a mad rush for the last one. I believe that the green collar boy is the most successful as he is 200 grams larger than his 3 sisters. When Cassonade lays on her side, the pups feed in two tiers. The top tier lays on top of the bottom tier.
In the video attached, watch the cream coloured pup third from the left as she dives down to the bottom tier from the top.