skinny pig cant eat or drink

Question
I have a skinny pig that i have had for 2 months, we believe he is fairly young still. He just stopped eating and drinking instantly. He wants to eat and drink - he goes to the water bottle and looks to his food but cant seem to open his mouth. He tries and he makes a funny face - trying to open his mouth and lifts his head. I have had him to the vet - the vet thinks his teeth are ok!? He thought he could open his mouth ok - He gave him a shot of antibiotics and i have been giving him a course of antibiotics but i dont think he is any better.
I think there is something stuck in his throat, or his throat is swollen. Is my vet missing something? Is there someting i can suggest for him to do? I have asked for an xray, ultrasound. The vet is thinking of sedating him as next option. My piggy has lost all his weight and i am very concerned that he wont make it. He doesnt make sounds like he used to either which makes me think its in his throat. do you think he could have got a piece of hay stuck in his throat? Could the doctor miss a malocclusion?
Thanks]
Terri

Answer
It's possible the vet may not have seen a malocclusion, and yes it's possible it's something in his throat. I had a sow that developed an abscess, or what I thought was an abscess on her throat. It didn't behave in the usual way, not responding to draining, etc.

It opened on its own and I could see an feel something hard in there. I didn't try to do anything to it or poke at it for fear I was seeing her esophagus. She was unable to eat and lost a great deal of weight. I had her euthanized and on necropsy discovered that what was in her throat was a tooth!  It had started growing inwardly and turned to the windpipe. I've never seen that before and hope never to again.

Whatever is causing this little guy's problem needs attention. Ask the vet to xray and see if in fact there's something going on that a simple visual inspection can't see.