Very likely, a number of things. First, wrinkly saggy skin is indicative of dehydration. Make sure they have enough water to dump all they want to and still have plenty left over to drink. Let them wallow if they want. It's what pigs do. No appetite, also dehydration related. Sunburn will cause them to have a fever, lose appetite and not drink enough. Get them some shade. A pink pig needs protection from the sun.
Fix these things first. If the pig isn't doing remarkably better the same day, give him a shot of banamine for the pain/fever from the sunburn and some B12 for appetite stimulant.
Shade, mud, water always when it's warm.
Fix these things first. If the pig isn't doing remarkably better the same day, give him a shot of banamine for the pain/fever from the sunburn and some B12 for appetite stimulant.
Shade, mud, water always when it's warm.