I have 12 pet rats, and cannot imagine ever not having a colony to enjoy. Our local pet stores have many cages, but most I found were too flimsy, or not big enough, or too expensive. Luckily, I found www.martinscages.com , a website for a company that specializes in cages for various animals.
I chose the large RUUD model cage. I learned to line the balconies and floors with carpet plastic runners to make cleaning much easier and keep my rats from getting bumblefoot. I like that the rats can each have their own areas, and there is a lot of room for them to exercise. I also always have...