Ok look, I get that you love animals. Thats wonderful, truly. But what you really need is someone (not strangers on a forum) but an actual person to teach and guide you in their care... and most importantly, to step up and tell you when you are taking on too much. Its a real shame that your parents don't appear to be filling this role.
Your animals need better care, and the reason people keep telling you to downsize is because its MUCH easier to manage just a few. The fact that your parents are not just allowing all of this, but buying MORE animals for you doesn't make them right, it makes them enablers. IMO, between the dozens upon dozens of chickens, the overweight pig, and now goats...you are dancing on the edge of hoarding.
Having that many animals in "make-it-work" conditions is not just bad for the animals, its REALLY bad for you. You seem overwhelmed already in some of your other posts, so I cannot fathom why your parents would allow you to further entrench yourself with more.
You seem like a good person with a big heart, and I want you to succeed, but you need to take care of yourself as well as the animals. Please think about finding new homes for some or at least not acquiring more for a while. A flock of 10 or so chickens and a pig is totally do-able, and you can learn so so much along the way. (Not to mention treat them all like royalty, AND preserve your sanity)
I really do wish you the best.