:pig:also know as diamond disease or east anglian disease, has to be treated quickly you will often see it during the hot weather and can be brought on by stress we had two go down with it last summer at seperate times never had them pass it from pig to pig touch wood, one due to the heat i syringed liquidised food into them for about 4 days every few hours both survied (until we took them to slaughter) we did this by moving them to a straw yard and letting them rest away from the other pigs the deep straw bed helped the lameness this disease causes we brought them both back to full health with no injections just loads of tlc.
you can inject against the disease but we tend not to.
dont give up hope and fingers crossed for yours.