New owner

Hi..we adopted two adorable male abyssinian piggies last week. I found them on craigslist and they were in a foster home. The woman took great care of them and gave me a large C&C cage that we put together they way it worked for our house. It is 2X4 with a loft and so far they are doing great. I have a few questions though as this is our first experience. We are using fleece which she also gave us. They always have hay-using orchard and getting meadow as well because I am allergic to timothy-, oxbow pellets and salads daily. How much fresh produce do I give them? I think they would eat it all day if allowed. Also I am keeping the food in the loft...what flooring should I use there...also fleece?
Thank you..I just want to do everything right for them.