I was looking at buying a new cage for my rats and I came across this one cage that I thought was pretty good for them. Topeakmart 52" Height 6 Level Ferret Rabbit Small Animal Cage Hutch Indoor with 3 Front Doors & Wheels Black The only thing that threw me off is that the bar spacing is one inch. Mr rats are about 5 months old and still pretty small. I don't have a good picture to show size but small enough that I'm a little worried that they can squeeze through those bars. Help?