sorry i did post something a few weeks back, but I just wanted to check - i bought some of that vetbed, but only 15 inches per piggy, I have to say they wee on it but it nevers feels wet and I want to see if I was to buy vetbed for the whole cage for each piggy, would i need to put anything underneath it? I am using towels and fleece, but they get quite wet easily whereas the vetbed seems to soak through to the bottom and the top always seem dry and I was thinking about getting it for the whole cage - I would need a lot, but when I get paid i was hoping to do this, if you could please let me know...thank you.