Pet rats are intelligent, clean, sociable pets who enjoy attention from humans. They come in a variety of colours depending on the breed and even their eye colour can vary from pink to darker eyes. Rats should live with other rats where possible, so you should aim to have at least two of the same sex together. Females are very fertile; they can get pregnant within 24 hours of giving birth and their litter sizes average 8-10. They can live happily together in mixed sex groups if at least one sex is neutered.
Pet rats aren’t entirely independent and therefore you should make sure you have enough time to care for them properly - they need at least an hour’s exercise outside the cage every day. You should also have a large cage with a solid floor with plenty of enrichment activities and toys. It is important to encourage them to show natural behaviours when setting up a cage, like climbing, balancing, gnawing, digging and foraging.