Article in English: Buy a large cage with solid flooring, levels, and ramps. Wire flooring, if not properly cleaned, can cause bumble foot. If you are not experienced with wire floor ware, steer clear of cages with wire shelving. 2 rats need a cage that measures at least 18 x 28 x 31. Rats cannot be housed in tanks due to the ammonia build up.  For every rat, there should be a minimum of two square feet, but two and a half square feet or more is better.  The bar spacing should be no more than 3/4 of an inch for a full grown rat, and no more than 1/2 an inch for babies. If the spaces between bars are larger than that, chicken wire can be used to close the gaps. The bars themselves should be powder coated to avoid rat urine corroding the bars. Rats are excellent jumpers and climbers and should be able to execute their acrobatics in their cage without flying through the bars.  An alternative is a perspex or plastic house, such as Rotastak cage. These usually have a colored base (which helps the rat feel more secure) and clear walls so that you can see your pets. They are designed to be interconnect with other units so that you can build a complex and interesting rat city for your pets. The rats can also be restricted to one area while you clean the other attachments. Cleaning perspex or plastic is easy because of the flat surfaces (rather than all the nooks and crannies in chicken wire or metal bars). Set up an area for your rats to eat and drink, providing either separate bowls for food and water or a sipper bottle. Always provide more than one food and water source for multiple rats to prevent resource-guarding. Sipper bottles are a great option because the water is kept clean in the bottle and the sipper is attached to the cage, preventing it from being knocked over by playful rats. Glass works best as the rats cannot chew through it. The bottom of the cage should be lined with a soft, absorbent material.  Use a wood-shaving bedding found at a pet store for your cage's bedding. Be sure you're not using pine or cedar shavings,...

Summary in Vietnamese:
Mua một chiếc lồng thích hợp. Thức ăn và thực phẩm dạng lỏng. Chọn lớp phủ sàn thích hợp. Xây tổ ấm. Chỗ để chuột đi vệ sinh. Mua sắm đồ chơi.