How are floppy-eared cats born? - briefly
Floppy-eared cats, such as Scottish Folds, are born with straight ears that begin to fold within a few days after birth due to a genetic mutation called osteochondrodysplasia. This condition affects the cartilage in their ears, causing them to droop and giving these cats their distinctive appearance.
How are floppy-eared cats born? - in detail
Floppy-eared cats, also known as Scottish Folds, are distinctive for their unique ear shape, which is the result of a genetic mutation that causes the cartilage in their ears to fold forward and downward. This characteristic trait is not present at birth but develops over time due to the abnormal formation of collagen in their ear cartilage.
The development of a Scottish Fold's distinctive ears begins as early as three weeks after birth. Initially, kittens are born with straight ears that resemble those of any other domestic cat breed. Over the course of the next few weeks, however, the unique folding process takes place. The cartilage in their ears starts to thicken and become more rigid than normal, causing the ears to bend forward and downward. This gradual transformation is a result of the genetic mutation that affects collagen production in their ear tissues.
The genetic basis for this mutation is well understood. It is caused by a dominant allele (Fd) that affects the formation of collagen, leading to abnormal cartilage development specifically in the ears. This gene was first identified in a Scottish farm cat named Susie, who exhibited the distinctive ear shape. Through selective breeding with American Shorthairs and British Shorthairs, the Scottish Fold breed was developed to maintain this unique ear characteristic.
Despite their charming appearance, it is important to note that the genetic mutation responsible for the folded ears can also lead to other health issues. Some Scottish Folds may develop osteochondrodysplasia, a condition affecting the bones and cartilage, which can cause joint problems and abnormal bone growth. Responsible breeders are aware of these potential health concerns and strive to minimize them through careful selection and breeding practices.
In summary, floppy-eared cats like Scottish Folds are born with straight ears that develop into their characteristic shape over the first few weeks of life due to a genetic mutation affecting collagen production in their ear cartilage. This distinctive trait is the result of selective breeding and careful maintenance of the gene responsible for the unique ear fold.