Pig eyes suddenly blind

This pig weighs about 40 jin. Everything is normal in the morning and when it is fed in the evening, the eyes become like this. They eat the same food, but the eyes can't see. What's strange is why the pig's eyes have become like this in such a short time? what on earth caused it? I hope you can give me some advice, thank you! Attachments: you need to log in to download or view attachments. No account number? Registration-is it caused by trauma?-reply: "Angel's smile is not caused by trauma, and there are no signs of struggle. I have found such a pig before. I have never seen it before. the master came out to give me some advice. -No, looking forward to the master's guidance.-it's scary.-isn't it wheat swelling? -No, waiting for the master.-it's horrible. Are you stimulated by something? The stimulation of bright light or strong gas? Or stabbed the pig's eyeball artificially?-it's really strange, the experts come to guide the maze! -this is the only example! -the first time I saw... Does anyone have a picture of wheat swelling.. Send it up and have a look. By comparison; compare.