I took my dog to the vet after he wouldn't eat or move. The vet's assistant gave me a powder that I am supposed to put in water called "Petdelyte" I feed him it every two hours. The vet was out today so that's all they could do for me. I am afriad how is he supposed to pee? Also he has blocked up sinuses, how can I get rid of it?

Dog: Chihuahua

Age: 3 years old