I was using newspaper in all of the cages, then I started using aspen bedding in the budgie cages. Last week I started to get low on newspaper and I asked my other half to try and bring some home from work and he came home with a giant roll of white paper. I cleaned cages last night and I had to cut the paper to fit the cage pans, which was kind of a PITA, but it is pretty thick paper, and I kind of like the way it looks in the cages. Since it's flat white, it looks a little cleaner than the newspaper did. I also removed the grates out of the budgie cages and gave them new aspen. I only took the grate out because it didn't seem to really serve a purpose other than to make something else I have to scrub. The trays in the budgie cages are so thin that, if they wanted to, I'm sure the budgies could reach stuff in it even with the grate. I make sure to scoop the bedding daily so it's always clean, and I figured it would give them something nice to sit on if they want to.