Why Is My Dog's Nose Turning Black

Why Is My Dog's Nose Turning Black. Some dog's noses change colors from a dark color to pink in cold weather; It slowly started turning grey/white/pinkish from black, over a period of about a month and a half.

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Now, it has taken over her entire nose. This is thought to be a result of the breakdown of tyrosinase, which is an enzyme that produces … It is important that you know all the reasons why it is that this discoloration can occur to take preventive measures.

This may be due to a poor diet, an autoimmune disease, allergies, and even to a skin cancer.

It is important that you know all the reasons why it is that this discoloration can occur to take preventive measures. 6/7/2006 · tyrosine acts via an enzyme catalyst called tyrosinase. Dogs are known to repeat this. This may be due to a poor diet, an autoimmune disease, allergies, and even to a skin cancer.