The yellow poop sounds like urates to me - my snakes, along with the snakes I work with, spew yellow poop every so often, along with white and a ton of clear stuff. I dono about the "huge" part, but a bunch of white/yellow poopy lookin stuff along with funky liquid is normal.
If it's a big, dog poop-shaped turd that's yellow though, that doesn't sound like anything I've seen.

~jenny
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1.1.1 normal ball pythons (Cindy, Darwin, and Periscope)
1.0 rex rat (Scurvy)
0.1 bunny (Spazz)
2.1 betta fishes (Vicious, Killer, and Butters)
2.2 great danes (Shasta, Odysseus, Merlot, and Watson)
1.0 fat fuzzy mutt (Smokey)
1.1 cats (Thidwick and Turtle)
2.0 horses (Buddy and Sam)
1.0 goat (Billy Jack)
2.25 chickens (Jacques the rooster and his harem)

but what I really want is more ball pythons!

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