I forget if Lily and Cocoa are fabric chewers. If they are, I do not know the safety of these as chewed-on fabrics.
I use baby changing pads as flooring for Wick in front of his litter boxes and by his hay stations. They are soft and moveable, but also water proof. They will absorb water, but it won’t leak through, and this can save you some mess in the long term. I’ve found there are two ways people make waterproof changing pads (I’ve bought many different kinds). One is having a more plasticy-bottom to it, and this is unappealing because it crinkles and isn’t very durable. On the other hand, there are some that have a waterproof-layer inside and they feel very soft and pliable, like a blanket. This is one I have specifically for Wick that I love (just got it; comes in a 3-pack): http://www.amazon.com/Changing-Liners-BAMBOO-REVERSIBLE-3-PACK/dp/B01ACR0PAK/
These ones are the first ones I got and work the best (you may have seen them on Wick’s instagram): http://www.amazon.com/Monvecle-Waterproof-Changing-Washable-Resuable/dp/B01M8JHV45/ … I think it’s a TPU layer that’s the waterproof layering I end up liking.
I do not know much about TPU’s environmental impact, but I prefer to have these instead of puppy pads since I can reuse them endlessly (wash them by hand or in washer/dryer) and I like them better than blankets/shirts because they don’t leak through, so it saves the floor.
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.