I was away for five days and got back last night. John took a really good care of the pups when I was gone - thank you John! He moved them from my den to the adjacent room, where he set up a pen with wood chips. Now pups can use their whelping box as their bed and play area, while the pen with wood chips serves as a bathroom. Even at such a young age puppies have a good instinct not to soil their bed, and they try to go to bathroom as far away as they can from their sleeping area.
Today we introduced pups to raw diet (Omas Pride ground mix), and they loved it. So now we have started a gradual process of weaning. Paika is still very good with the pups, but they have sharp teeth and nursing cannot be comfortable for her.