HairAreYourAerials t1_ist4y4g wrote on October 18, 2022 at 2:49 PM

Reply to comment by Neraph in TIL that when a cat has a flat face (such as a Persian), that is actually a deformity. Breeders, however, are able to find ways of altering the cat’s genetics by choosing who they breed with. They do this because so many people gravitate to the smushed in face. by dioWjonathenL

But in this case selectively breeding for features that have an adverse effect on the animal’s health.

Neraph t1_istfrlx wrote on October 18, 2022 at 4:01 PM

Turns out most of them do. How many breeds of dog now have hip dysplasia as a breed? Red hair in humans leads to lower pain tolerance and greater risk of sun damage to the skin. Bacterial resistance tends to make organisms that don't do as well under ideal conditions, though they can survive extremes well.