There's a lot of "almost", "about", and "maybe" estimating going on in that post. It's completely understandable that you wouldn't want to post financial details, but I hope you know actual, hard numbers for those things that you weren't clear on in your post. If you're treating them as an investment, I'd encourage you to actually do the math if you haven't, and take your time into account too.
Where are the pigs kept, and what does that space cost you? And the straw they're laying on? Vet bills? Gas and vehicle mileage for trips related to the pigs? How much time is spent caring for them and then handling selling transactions? Any special tools or equipment needed to care for them or the space they're in? You're making $20/piglet per month by your estimates. How much does it cost to feed/house/care for those pigs during that time? What value do you put on the time you spend on them?
I'm not asking for specific details. Just saying that you would need to consider those things in order to get an accurate picture of how they're performing as an investment. If it's just a hobby, that's a little different. Having a hobby that you can make money off of is cool. That may or may not make it a good investment of your time and money.
I know that everybody's risk tolerance and area of expertise is different. It's fine if you're more comfortable with asset classes that aren't stock. Just understand the situation fully and realize the benefits/drawbacks of any possible approach you could take. It's not much different than the Tesla truck discussion that started this thread. There are some people that it works for, and some that it won't. Doing your best to understand all of your options, and making the choice that is best for you is all anybody can do.