I've never heard of those pads before, but they sure look neat! I used to put mole skin on my duck's feet bottoms to help with callouses, but the mole skin can be slippery on hardwood or tile floors. I have added a non slip pad to the bottom of the shoes for ming mei when she's running around the house, otherwise she wears normal shoes in her pen.
I guess for baby ducks, those doggy pads would work okay, you'll have to probably cut them to get them the right shape/size. Baby ducks don't bathe as often so you won't have to worry about them falling off as easy. When they get to be grown ducks, they might fall off easier, but I can't say for sure, since I've never used them. You'll probably have to change them weekly I'm guessing, so the feet can get clean. I'd also recommend you wipe their feet/pads with a baby wipe daily so no poop gets stuck under a part of the pad.
If you use them, do let me know how they turn out!
