1. Rats have poor vision. To compensate for this, a red or pink eyed rat will often weave its head side to side to add "motion" to see better. They also don't see in color.
2. Rats normally prefect to have cage mates. It is possible to group female or male rats together, though care should be taken when introduction a new rat.
3. Rats can eat chocolate. Rats can also eat smaller pets. Rats are omnivores, and have enough predatory instinct left in them to consider birds, fish and even some smaller rodents as "snakes."
4. Rats don't have canine teeth. Rats don't have thumbs.
5. A rat's temperature is regulated though its tail (assuming it has one). A really hot rat will lie on its back so that it can "sweat" through the soles of its feet.
6. A group of rats is called a mischief.
