We took him to the vet and they thought he may have ate something bad so they gave him a nausea shot and hydration shot, we waited a couple days but nothing changed so we took him back and they gave him an antibiotic shot and some pain medicine because the doctor think it might be an infection, we are taking him back tomorrow to get tests done if he doesn't get better, i dont think it's something he ate considering his drool smells bad and he's still interested in food but he makes it seem like it hurts to chew or swallow. He has just been sitting by his water bowl for the past 3 days, he barely moves and it's the sadest thing ever, he won't even lay down fully he just crouchs with his paws under his body. I've been reading a lot about it but I would like some people's opinion on what it could be. I've been hand feeding him wet food diluted with some warm water, he's never been this sick before I mean he's might of acted funny for a day but never to this extent. Please help me.