There is no foolproof way to tell if a Cockapoo puppy will grow to have a curly coat at a young age. It is not until their adult coat starts to come in at around the six to eight-month mark that owners will find out if their puppy will have curly hair. However, there are ways to increase the odds of getting a curly-haired adult. Some breeders will breed with a larger gene pool from the Poodle side of the equation to increase the odds of curls over straight or wavy fur.