My female cat is 13 yrs old. She has had extreme diahrrea for 2 days. tonight she is running back and forth and acting frantic. Can I do anything for her tonight?

I would take her in immediately. I hope you already have.

You can call and ask but they will probably advise that you take her in to at least get fluids and maybe start her on antibiotics and something to help calm her stomach. They are open 24hours and there is an additional charge from 8pm- 8am. They are wonderful and will go over all of the charges prior to doing anything as well.