Which of the following is NOT a risk factor for ulcerative keratitis in brachycephalic breeds?

Brachycephalic breeds, such as Bulldogs and Pugs, are particularly susceptible to ocular issues due to their unique anatomical features. Ulcerative keratitis, which is a condition characterized by the erosion of the corneal surface, can be influenced by several factors.

Ocular prominence, or the bulging of the eyes, is common in brachycephalic breeds and can lead to increased exposure and potential for ulceration. Tear film abnormalities, including inadequate tear production or poor tear distribution over the cornea, significantly contribute to a dog’s risk for developing ulcers since tears are crucial for maintaining corneal health. Additionally, adnexal abnormalities, such as ectropion or entropion, can cause abnormal eyelid positioning, resulting in conditions that predispose the eye to injury and ulceration.

In contrast, increased corneal sensitivity is not generally recognized as a risk factor for ulcerative keratitis. While a heightened sensitivity might affect the way a dog responds to environmental stimuli, it does not inherently increase the likelihood of developing ulcers in the cornea. In fact, brachycephalic breeds often experience decreased corneal sensitivity due to their anatomical structure, which could lead to a reduced perception of discomfort associated with corneal defects.