Here's a breakdown:
* Desired Trait: Over centuries, people have bred Pekingese with increasingly shorter noses and flat faces. This is seen as desirable in the breed standard, as it gives them a distinctive, "cute" appearance.
* Genetics: The genes responsible for facial structure are passed down from parents to offspring. By repeatedly breeding dogs with these desired traits, breeders have concentrated those genes in the Pekingese lineage.
* Health Consequences: Unfortunately, selective breeding for a flat face has come with significant health drawbacks for Pekingese. This includes:
* Brachycephalic Obstructive Airway Syndrome (BOAS): Their shortened noses and airways make breathing difficult, leading to snoring, wheezing, and even heatstroke.
* Eye Problems: Protruding eyes are more susceptible to injury and can lead to corneal ulcers and other issues.
* Skin Folds: The folds around their face can trap moisture, leading to skin infections and irritation.
Important Note: It's crucial to understand that while the flat face of a Pekingese might appear cute, it is a consequence of human intervention and can significantly impact their health. If you're considering getting a Pekingese, it's important to research responsible breeders who prioritize the well-being of the dogs, not just their appearance.