I’ve seen several recommendations in what to do for frost bite. Coconut oil, Vaseline, ointment. I need to do something. My coop is fairly warm with shavings, and sealed pretty well, with some ventilation. Any ideas would be much appreciated!
Can you clarify your question?
Are you seeing evidence of Frostbite on your birds or are you wanting to "prevent" Frostbite?
Ventilation is very important, even in cold weather. Provide areas where the birds can be out of the wind.
However, even with good ventilation, wind blocks, etc., sometimes birds, especially those with large combs and wattles can still have Frostbite just due to exposure.
You don't want to apply any oils or ointment to the combs/wattles during cold weather, this will lock in moisture and could potentially cause the exposed tissue to freeze, thus becoming frostbitten.
If you have birds that have Frostbite already, then don't touch affected areas. If it's combs/wattles, then eventually damaged tissue will die and fall off (self-dub).
If you have photos of your birds and housing you wish to share, they are always welcome.