I know a bought cage is best for rats. I can’t afford one at this time. I do how ever have wire and a storage shelf that isn’t doing anything but taking up room. It is adjustable so the levels inside can be different width and height. I was thinking from top to bottom about 50 inches and 40 inches wide with a depth of 16 inches. I did the calculations and it is big enough for 8 rats! . I don’t want more than two until I know I can give them enough attention. That being said I can make it shorter but not narrower. Is this to big for my 2 month old babies?