he American Curl’s most distinctive features are its luxurious plumed tail, large walnut-shaped eyes, and backward-curling ears that give the cat a happily surprised expression. The ear-curling gene, which arose due to a spontaneous mutation, is dominant, meaning that any kitten with one curl-eared parent might inherit the trait.
American Curl kittens are born with straight ears. The ears begin firming up and curling backward when they are 3-7 days old. Ears unfurl gradually over the course of 16-18 weeks, after which they are permanently set in the adult position.
