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I am sorry to hear that Captain lost an eye and now all her hair.
Usually once you treat for the fleas and the allergies, the hair does grow back, but it can take 1 to 3 months. If it does not grow back, you may want to check for hormone imbalances causing her hair loss.
Melatonin may help grow new hair: 3 mg daily.
Let me know if this is helpful and what else I can answer. Rebecca
I hope you could see my answer. Can I help with or answer anything else?