Same here. I also have a wooden hay rack but the bits that fall out don't really get trailed round the rest of the cage thankfully. I can pick the worst off myself.I use a litter tray filled with hay. Keeps it all in once place. The odd bit gets trampled but no where near as badly.
Asbo pigs ha ha xx made me chuckle xxI think it depends on the pigs sometimes! I have an upturned cardboard box with all the front cut out and fill it with hay for two boys and this is fine, hardly any overspill.
However, my other two, the asbo pigs, had their taken off them as they were wasting it too much, pulling it all out and peeing on it. So they now have a hay rack but they're still very messy, they just can't pull it all out as much!
I have used a corner litter tray too, new pigs didnt like it though. What about an enclosed cardboard box with a large hole in each end so they can go in and out? might find it fun too plus you can just through the boxes away and replace.
I have something similar and it keeps most of it off the ground, although I'm not currently using fleece. It's a hay rack with a food dish attached to the bottom that comes on two clips, so you can hang it on the side bars of the cage and keep it slightly off the ground.. which also helps with piggies whoI have my hay in a rack with a little tray underneath. that catches most of the spillage.
Could I ask how you fasten your doors up please? I was considering having a door opening so I could extend the top layer a bit further, but tried bulldog clips, but the ones that fitted the grill, i felt they popped open very easily?works well, and it gives them a bit of exercise having to jump in!