Hi familyh12,
I understand you are scared to take the rawhide away from your doberman when she shows her teeth and growls.
My suggestion is not to give things that she becomes possessive at until she gets really trained not to show any resource guarding aggressions.
Does she have food aggression? Does she growls or bear her teeth when you pets her when she is eating? Can you put your hand in her bowl and can she stay calm?
Rawhides and bones make dogs especially possessive because they see those valuable. Once your dog understand that she does not need to protect them from you, you will be able to even hold it for her while she chews and ask her to drop it when you think she has had enough for the day.
Has she got basic trainings, such as sit, down, stay, come, etc.?
Once she masters those, teach her "Leave it" and "Drop it", using something not valuable for her. Let me know if you don't know how to teach those commands.
Good luck
