I have 3 piggies, 2 girls and 1 boy. At the end of the month the 3 of them will be able to be in the same cage (the male got neutered last week). They are currently in pet store cages, and I was wondering if a 2ft by roughly 5.5ft home made cage (made from pet play pens, and a plastic tarp) would be big enough for the 3 of them or do I have to expand it?