Well things definitely seem to be looking a bit rosier on the puppy front here these days. We've been feeding the pups a home made food concoction that avoids some of the things that their kidneys will struggle with (plus it's not dry). So far, there's been a marked improvement both in terms of the frequency of widdling on the floor, and also the colour of said widdle. Both seem to be growing well, and gobbling down their food like its the end of times.
They do however really not get the notion of shitting outside. I have observed Kaylee come inside from the garden expressly to shit on the floor and then go back out again.
More photos will follow when I get my phone back from the menders.