Do pale, yellowed comb (frostbit) tips always turn black?

[Carrie Lynn]

And, how long does it take?
Thanks

 

[CMV]

I can't give you an exact time frame because each chicken heals differently. They do not always turn black. They can just get scabby looking and then heal up. The more mild the frostbite the less likely it will black up and slough off.