Rabbits
A rabbit's teeth never stop growing
They grow around 2 millimetres a week and are worn down by hay. A diet without unlimited hay leads to painful dental spurs.
More in Rabbits
Rabbits leap and twist when they are delighted
The move is called a binky. A rabbit that flops on its side is completely relaxed, which is high praise from a prey animal.
Rabbits should not live alone
They are social to the core and pine without a bonded partner. Neutered pairs groom, sleep together and are far calmer with people.