I have found a place where I can get a 60-70lb bale of 2nd cut timothy hay for $3 and Grass 60lb bail for $2.50 so I am considering buying 1 bail of each and mixing them for my piggies rather than the small 20oz bags of hay I get from my local feed store. My question is this..I am thinking about filling my 2X4 top with all hay and changing it as needed. My lower cage is a 4X5 and I am currently using newspaper layers covered by fleece on top so I dont think I want to put hay there but then again I would if it would make the piggies happier. Anyone have any thoughts on this for me?