Kaytee My First Home Habitat for Pet Rats - Durable & Spacious Cage for Small Animals - Perfect for Hamsters, Mice & Gerbils - Ideal for Playtime & Safe Housing

I bought this cage as a secondary cage for my four female rats for when I'm cleaning their big cage. (A double critter nation) I thought it would also be good to use as a hospital cage should I ever need it if one of my girls were to get sick and need to be quarantined. This cage is perfect for female rats as it has the 1/2 inch bar spacing. I didn't use the ramp since I felt it just took up too much space and my girls have no problem climbing to the shelf. The shelf and the food bowl holder are nice features since it gives my girls some place to climb on and a place to hide under. Plus, I can put food in the bowl for them if they're going to be in there for a little while.It's a great size as a secondary cage but I definitely would not recommend it as a rat's primary cage because it's just too small for long term housing.It does attach easily to the base, but for added security, I used zip ties to hold the cage onto the base.