She was right. However, with growth comes poop - and lot's of it! The puppies are starting to defecate on their own, even doing a crab walk squat. While a lovely developmental milestone it means that there is poop everywhere. Rather than a localized spot that is easy for Reba to clean up, there is poop spread from one end of the bed to the other. As the pups grow I'll plan to have a toilet area and a sleep area in their pen. But we're not there yet.
Where we are is me having a battle to keep things clean. Every second day I take the mats out, lay down extra thick newspaper, and spray the mats off. I follow this with a wash using an antibacterial dish soap and then hang the mats out to dry.
I'm sure I'll soon lose the battle but I plan to keep trying!