Congrats on your new additions. If you want to post a pic of the cage people can help give suggestions. A couple things off hand without seeing the cage, make sure there is no plastic in the cage, also things made of paper or cardboard are not advised to use in the cage since some chins eat it, which can cause a blockage. For two chins you really two of everything (food bowls, hay holders, water bottles, places to hide, etc) to avoid any resource guarding that could lead to fights.