so i plan on making like a super cage for my guinea pigs and i was wondering if i make a cage that big just for 3 guinea pigs will it like make them sad having a whole bunch of space but lots of that cage will be pretty empty at first but over time i plan on filling it so basically will they use the open space that dose not have much stuff in it and can any one give me any ideas on how to make or use something for them to burro in like if i were to get like a plastic box and make like 5 holes one on each side than one on top and then fill it with guinea pig bedding or hay do you think they will like it as a little hiddy and on that note is it safe to fill it with bedding or should i just use hay