The ears are supposed to be semi-prick, or tipped, with the upper third folded over. Ears which do not 'tip' properly, however, are common, and many collies have their ears taped as puppies (using medical adhesive or paper tape) to encourage them to lay properly – no cutting or surgery is involved. While Rough Collies are generally resilient and healthy, there are some health problems that can affect the breed. The ears are supposed to be semi-prick, or tipped, with the upper third folded over. Ears which do not 'tip' properly, however, are common, and many collies have their ears taped as puppies (using medical adhesive or paper tape) to encourage them to lay properly – no cutting or surgery is involved. While Rough Collies are generally resilient and healthy, there are some health problems that can affect the breed. Collie eye anomaly (CEA), a genetic disease which causes improper development of the eye and possible blindness, is a common ailment in the breed.