H, I'm Dr. Steve
What dewormer did you use?
Thanks, XXXXX XXXXX eqvalan you have taken care of internal and external parasites, esp lice. The next most likely cause of the hair loss is hypothyroidism. As animals (including donkeys) age, their thyroid gland can stop producing thyroid hormone or not produce it at a high enough level. Hypothyroidism can cause other health related problems, but one of the first things we see is patchy hair loss. A blood test is necessary to confirm this diagnosis and to tell how low your donkey's thyroid level is. Then your vet can prescribe a thyroid supplement at an appropriate dose for him.
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