What does a low cortisol level mean?
what does it mean to have a low cortisol level of 3.0 and what could cause this
Well, Pica is often a symptom in Addison's disease, which is caused by low Cortisol. So, the only discernible connection I can see is a low cortisol level. I see one of the categories you put this question in is "Dog Health." If you think your dog has one or both of these conditions, you should take him/her to a vet.
Cortisol is a steroid hormone. It is specifically a glucocorticoid that is produced by the zona fasciculata of the adrenal cortex in response to stress and a low level of blood glucose. It's functions are to increase blood sugar, suppress the immune system, and aid in the metabolism of fat, protein, and carbohydrate. It also decreases bone formation. Cortisol is not to be confused with hydrocortisone, which is used as a medication.