I really think the best way would be to completly re-read it when you have free time, it’s “only” 24 chapters and if you do re-read it you should really focus on the hospital and who is in it
But kinda from what I remember (i dont remember their names 100% so i will tell their animal form)
When little A was little his parents kind of homeschooled him and stuff and he went to a doc who was his whole life asking him if he was fine (something the piggy was referencing to at the end), little cow was seriously sick and in hospital and his dad was there with him quite often, also Kendrick was most likely a nurse in the same hospital
Little A also once saw something on the farm and since then he couldnt visit
Little A also left his parents (i think) and worked a lot of different jobs but not sure if he lasted long in them
Uncle A also looks like some kind of hybrid
And at the end we can deduct that the org that the farm is under has some ai robots looking like people and that is why his blood was blue

I’m so confused. If anyone could take the time to explain what my tiny brain can’t se to grasp, I would really love you.