I use
Becks reusable waterproof bed pads when I deem it necessary, especially since recent due to Gizmo and Gadget having upper respiratory infections and the vet suspecting it's the wood bedding. The size I get it much larger than the bottom of my cage so I fold them in half and then fold the end slightly under the food dish and water bottle.
I was spot cleaning every day and changing the pad every 2-3 days with two piggies, depending on how much urine they produced; now that Gizmo's alone, I plan to spot clean every 1 1/2 day and still change every 2-3 days. The good thing is that you can get them free if you get incontinence supplies where I live. I personally would suggest them since you can get them pretty cheap, if not for free, since you can use them still as bed pads (make sure to wash them first, no matter how much you love your piggies!
). They're also a good use for putting in your car for long trips with your dog, putting in the bottom of a travel cage with the piggies to not make a mess with bedding, and on the floor when you let your piggies roam around in a pen like I do since they're super absorbent. Trust me, all these scenarios are tested by us personally.
Only downside I see with them is having to rewash them often and now being a complete slave to my piggy; he's loving it though, as did Gadget before he passed. Gizmo also likes to chew on the ends of it but he doesn't eat it-eat it.
Gizzy was being shy when I pulled out the camera. That, and he's kind of grieving. But that's what the cage looks like. Remember, white side up with the pads~.