Sick pigs will not be inclined to eat much. Even when a sick pig does eat, its illness causes nutrients and vitamins to be expended at higher rates than normal as the pig fights off the infection or disease afflicting it. Check your pig's temperature with a rectal thermometer. The temperature should be around 102.5 degrees Fahrenheit. If your pig has a fever, take it to the vet immediately. Look for signs your pig is ill. If your pig is acting lethargic, squeals painfully, has diarrhea, or does not eat, it may be ill. There could be one or many causes for your pig's illness, including viruses, parasites, or poor nutrition. Take it to a qualified veterinarian for a checkup. Deworming regularly (every thirty days) will keep your pig healthy and remove the parasites that steal nutrients and calories away from your pig. You don't need to take your pig to the vet in order to deworm it. Rather, you can purchase a commercial deworming medication at your local farm supply store and administer it directly to your pig. Most require a three-day feeding cycle. Be sure to follow the directions with your pig's deworming medicine. You do not need assistance to administer the deworming medicine. Simply add it to the pig's feed, typically at a ratio of one cubic centimeter per 50 pounds of body weight. In other words, if your pig weighs 100 pounds, you'll probably add two cubic centimeters of deworming medicine. However, always use the prescribed dosage when administering any medicine to your pig. If your pig has recently had an operation or been injured, it will not want to eat much. Check your pig's legs and belly for sores, and check its feet for sharp objects. Patch up small wounds. If you see serious injuries, take your pig to the vet as soon as possible. You should also bring your pig to the vet before introducing him or her to the rest of your pigs. This will ensure the pig doesn't introduce parasites or illnesses to the other pigs. If you observe any strange behavior such as lethargy, staggering, poor appetite, it may be injured internally or ill. Bring your pig to the vet for an examination. Pigs should get a checkup from the veterinarian at least once each year.
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One-sentence summary -- Monitor your pig's health. Deworm your pig. Check your pig for injuries.

The absolute last thing you want to do is to injure your arm just when you're starting to practice a new skill. Make sure you do a dynamic warm-up in which you get your arm moving gently first. A few ideas for warm-up exercises you can do are: Swinging your arms horizontally and vertically for 30 seconds each way. Using an elastic exercise band to stretch your throwing arm. Gently moving through the throwing motion 20 times. The direction of the spin should be such that the ball is spinning forward. Doing this isolates the actual action which creates the spin on the ball. You can do this anywhere as long as you have a baseball and you can toss the ball up a few feet in the air. When doing this, really try to emphasize the flick in your fingers as you drag them down over the front of the ball. The goal of this is to maximize the revolutions you can get on the ball but start out by just mastering the direction of the spin and then working towards full revolutions. When you pitch, putting your whole body into each pitch is really important as this gives you the maximum force you can get. However, when you are just starting to practice the curveball, isolating your arm and hand action is helpful, which is easier to do when you're on your knees. This is also a great way to build muscle memory and minimize the number of factors involved in your throwing action. A really important part of throwing a curveball is ensuring that you get the direction of the spin correct and that you can repeat this at least 80% of the time. As such, throwing at half your regular speed is a good halfway point to get your action started but to minimize the variables you have to battle. If you feel like you want to start at lower than half your regular speed then that is absolutely fine, the key is that you don't jump straight into 100% and sacrifice your accuracy. Don't be too concerned if you aren't seeing too much curve from the ball here. Everything you're doing at the moment is working to maximize the efficacy of the throw when you move to 100% effort. After practicing on your knees and getting the hang of throwing a curveball, it's a good idea to try pitching while standing up so you can practice throwing with a fuller motion. This is a more realistic representation of how you will actually be pitching when you play. You don't need to start out at full effort level here, the most important thing is that you are standing up and preparing to use your lower body. This is a skill that takes hours and hours of practice but the results are incredibly rewarding. Always listen to your body if your arm is getting sore and take breaks as necessary. Sometimes videoing yourself pitching can help as you can pick up on errors you are making that you don't realize you are.
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One-sentence summary --
Warm up your arm by doing a few different arm exercises. Practice flicking the ball upward while getting spin on it. Get down onto your knees while you're practicing. Throw the ball at half of regular speed to your partner when practicing. Practice pitching standing up once you get more comfortable with the throw. Practice every day if you can!