I’ve had two female gliders for about seven years the youngest one has for some reason lost all the hair on the top of her for head in a V-shaped formation. Can anyone please tell me what is causing this? Thanks so much for your help!

Do you have a picture by chance?

How is their behaviour and what diet are they on?

They are on Instant HPW w/ HPW Complete added and apples. They do get meal worms as treats. (not a lot though)

I have had them both from birth. They are 5 years old. They have not been spayed.

They have always gotten along fairly well. One is considerably larger than the other. (the one losing her hair is the smaller one)

They don't fight over food, I feed them in two separate bowls.

I don't have a pic, but it looks like someone shaved her light hair off her face with exact precision.

My dogs like to sit at the cage and bark at them and watch them occasionally but we make them stop right away.

I have to think it is over grooming from what i have read but she seams her same old self.

This is all I can think of to mention. Thanks for any advice you can give me.