I just finished reading the thread and it sounds like this is not about poop. It sounds like you're annoyed with her and don't want to put in the work (yes, it is a lot of work) to train her and stuff.
All these problems can be solved. My dog ate catfood too, I made their feeding place very high up. They have no problems jumping up there but he can't.
And she's not being stubborn or an alpha. She doesn't know what you're expecting from her and she's bored so she's expanding energy this way.
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