What defines them
The living-room cat par excellence, the Persian is calm, settled, not much of a climber, attached to his habits and his favorite room. His flat (brachycephalic) face limits his breathing and tear drainage, and partly freezes his expressions: the round, wide-open eyes are his anatomy, not an alert. He pants sooner than other cats and copes badly with heat. His long coat needs daily care, without which his mood deteriorates.