Thanks for the advice again

I got the nutri cal and put it on the roof of his mouth. He got shaky again right after but I had the window open in the kitchen for a few minutes so I don't know if it was sugar related or he was just chilly. He hasn't eaten since this morning so far. I moisten his dry food and smash it up and mix in a tbsp of canned food but sometimes he does eat dry pieces.....he can bite them into pieces and then eat the pieces. He just worries me so much. He is also starting to have more discharge from his eyes.....is that anything to worry about?