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Hello. Thank you for asking your question. My name is***** will try to help.
Where on her body is the hair loss? I would be happy to look at a picture if you would like to show me one of the hair loss.
Did she have the scratching and hair loss before she went outside?
Do you have a flea comb or could you get one? Just in case because that is an easy fix. Take a flea comb and comb down her lower back 10 times. Make sure you get close to the skin. Take everything you get and put it on a white paper towel. Add a few drops of water. If anything turns reddish then that is digested blood or "flea poop"