Neopolitain Mastiff

Question
I have a neo who is 2 1/2 and over the last 2 weeks has shown aggression tendencies and nipped my 4 year old daughter (didn't break skin or bleed) also seems to have had weight loss and mounds of hair falling out although no bald spots showing.  She also hasn't seem to be her self, quite lethargic.  Please help

Answer
It sounds like it could be some type of hormonal disorder,such as Cushing's disease,a thyroid disorder ot addison's disease

You would have to take her to the vet to have a blood test for these disorders

I have a dog with a thyroid problem,and it is easy to to treat,so if that's what it is the dog will have treatment for life but it's cheap