cat food is your problem -- it can be very dangerous to dogs. Please do not feed this to your pup again. There are a lot of other things you can do to entice Maverick to eat.
Either go to the ER vet tonight - my first recommendation. He needs immediate help.
If you are not going to do that see if you can get some chicken broth in him. If you buy it get low sodium. Also, feed in a bit of pure canned pumpkin (not spiced pumpkin pie filling) I would also recommend some pedilyte |