My female pitbull just went...

Question
My female pitbull just went out of heat about two weeks ago. Now she has
not been eating well and seems to want to eat alot of grass went we take
her out. My concern is what affects the grass as on her and why she feels
the need to eat so much of it?  I usually do not let her eat it but if she
eats to help herself naturally I don't want to prevent her from helping
herself. Any advise will be appreciated.  

Answer
I would not be concerned so much with the grass making her sick as the fact that she is not spayed and she could have a uterine infection (pyometra), which can be life threatening.  The grass won't have any effect on her unless you treat it with chemicals...dogs usually will eat grass to reduce the acidity in their stomachs and make them vomit.

Your best bet and safest course of action is to take her to the vet for an examination.