Critter Nation by MidWest Homes for Pets Double Unit Small Animal Cage, Habitat for Rats, Chinchillas, Ferrets, Sugar Gliders, Tool-Free Assembly, with Full-Width Doors, Shelves & Removable Base Pans

Awesome! If you have any other questions I might be able to help. I’ve had a lot of pets in my life and feel pretty confident with answering things. The cage I used to have was similar to this one https://a.co/d/04me5fYr

Hi, modular cages, double critter nation cages or xxl dog crates are all cages we usually recommend. Here's a few links of modular cages and other:- https://www.amazon.com/Indoor-Playpen-Outdoor-Detachable-Exercise/dp/B0FR4RMM9X- https://www.amazon.com/VISCOO-Enclosures-Playpen-Detachable-Exercise/dp/B0FD3BG6P5- https://www.amazon.com/MidWest-Critter-162-leak-Proof-Measures/dp/B001NJ0DAY (More expensive but I'm pretty sure that's the double critter nation cage people like) No matter the cage always make sure the gap between the cage bars is small (0.5 - 1 inch) Also here's an estimate of the numbers of modular cage's panels you need to make those cage size:- 3 rows lenght, 2 rows height, 2 rows depth: 107x70x70cm | 42x28x28 inches = 32 panels- 4 rows lenght, 2 rows height, 2 rows depth: 140x70x70cm | 55x28x28 inches = 40 panels- 4 rows length, 3 rows height, 2 rows depth: 140x107x70cm | 55x42x28 inches = 48 panels- 4 rows length, 4 rows height, 2 rows depth: 140x140x70cm | 55x55x28 inches = 64 panels (what I have, you will need to buy at least two large cattios to make this so more expensive)

https://a.co/d/0wuC7T4 It’s a critter nation double unit. The top unit has a hole (so rats or ferrets can go between levels) that can be blocked with stairs and I had to order a second full tray for the bottom of the cage. The wire spacing is small enough for parakeets.