Not sure what is wrong..

[Kittifer]

I have a year old boar, who lost a lot of weight, from 900g to 550g ... He is partially blind and mostly deaf. He is on his own. Petrified of another boar dominating him as he is a problem piggy. He has been to about 6 vets in total (which isn't cheap and has left me skint!) none can fathom what is wrong with him, all recommended to leave him as he is as he does eat/drink and toddles about his c&c cage happily? Has anyone else had this problem. I have not had any signs of PTS since it happened. I am just concerned about his weight and skinnyness. :{

 

[Kittifer]

He is my profile photo, that was when I first got him. He was badly neglected and I rescued him! He is an alpaca.

 

[Amanda1801]

Can we have some more information?

How old is he?
Over what period of time has the weightloss happened?
What food does he eat and how much?
How much does he drink?
Are his urine and faeces normal?
Have there been any changes in his eating/drinking habits?
What diagnostic tests have these vets done, and what were the outcomes?