The very first thing you need to do is check for a fever. Pigs core body temperature's shouldn't be more than 100 degrees in my experience; although each pigs normal temperature can be slightly different. Mini pigs have a lower core temperature than farm pigs and likely slightly lower than piglets whose tend to be a bit higher. Cathy Zolicani, DVM, was kind enough to write up an article about dealing with a vomiting pig and you can check that article out in our first aid section or by clicking here. Know that just because your pig doesn't have a temperature right now, doesn't mean your pig will not develop one in a couple of hours. Things can go from slightly worried to full panic mode super quick. A normal temp for most mini pigs older than 3 months is somewhere between 98-100. If my pig has a fever of 101? I personally monitor and take it again every 4 hours or so until its normal. At 102, I treat the fever. At 103 or above?, I call my vet. Having a low grade temperature can be helpful because it is the body's natural way of fighting an infection. A higher core temperature is a result of WBC's (white blood cells-the body's cells used to target and attack infections or foreign objects introduced in the body) and pyrogens, which are the chemicals fevers produce. These pyrogens make their way to the brains hypothalamus, which is the temperature regulator for the body, but when these pyrogens bind to certain receptors in the brain, the result is an elevated body temperature, otherwise known as a fever. Some of the pictures below are graphic....
Based on what your pig has access to, most pigs are at risk. Pigs will eat rocks, plastic bags, wrappers from food items, blankets, even hay can bind up in the intestinal tract and cause a blockage. I have seen cases where undigested pellets caused an obstruction that required surgery. (which is one of the reasons why we suggest soaking pellets before feeding, not only does this allow them to swell and help your pig feel full, versus depending on your pig to drink enough water to get the pellets to the swelled state in order to give the the brain the signal to tell the stomach it has had enough to eat. Soaking the pellets also reduces the chances of the pellets being digested in their pelleted form and causing a blockage)
Sometimes bowel obstructions aren't because of anything ingested. There are times when the bowels twist and because of that twisted gut, the bowels can't operate as they're intended causing no blood flow to that area and necrosis. The necrotic bowel will never function again and only surgery to remove the dead parts can correct something like this. Click here to read more about obstructions.
The take away from this? If your pig has a fever, is vomiting and hunched over attempting to poop but isn't able to or nothing is coming out? That is an emergency. Get your pig to the vet!
Let me add, once you see the mold, it's been there for a while. You can NOT just remove the surface mold and feed the rest to your pig, mold has a root like system and that whole batch of feed needs to be thrown away, maybe even sent for testing. Contact the company that made that brand of feed and let them know. Trust me when I say, they want to know when theres a problem with their feed. Most major brand feed companies ask that you notify them if you experience moldy food. They will likely ask you to send a small sample of that feed to them so they can determine why it is moldy and/or proof of purchase. (for the date feed was sold versus when it should've been removed from the shelf at the store/expired) Keep your feed bags regardless, there are programs in place where some of our piggy friends are using those feed bags and making totes to sell and the profits go to some of the pig rescues. Click here to learn more about that program. The information about saving the feed bags is at the bottom of that page.
We also have a health document that is downloadable/printable on our website. Using this before you call the vet can help you answer questions your vet may have for you about the situation. You can see that form by clicking here.
If there are ever questions about your pig in a crisis or urgent situation, and by urgent we mean high fever, lethargic, off feed, etc, CALL YOUR VET!!!!!!!! Do NOT waste time asking people for opinions. Some of these conditions can be treated if your vet is able to intervene in time. Let the first opinion be from your vet, not people you don't know. Familiarize yourself with illnesses that need immediate attention so you don't even have to ask others what they think.