My 4 year old Jack Russell Terrier is laying around and seems to have some trouble walking steady. He has a green discharge in his eyes that will not stop. I wipe them and liquid runs from his eyes until the discharge builds again within 30 minutes. He is eating, and not vomiting. I carried him out to go to the bathroom and he went forever. But when I tried to walk him to see if he needed to poop, he seemed as though he was unsteady on his legs. What could be wrong with him. I can not see the vet until morning. Should I make an emergency call?