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"When water molecules escape from your frozen food, it is also possible for oxygen molecules to seep in. The oxygen molecules can dull the color and modify the flavor of your frozen product. Food that has freezer burn is safe to eat, but you may find the texture and taste not to your liking."
Source - https://www.loc.gov/rr/scitech/mysteries/freezerburn.html
Answer:
Looks like hair loss to me, you might want to go get that checked out in the vet.
Answer:
A) You should start stretching at a slow, safe level, but never increase your frequency, intensity, or time
Probably his/her first action should be to cover or gauze the wound, then assess vitals, and start intravenous (IV) access.