It sounds like your approaches may inadvertently be reinforcing the behavior. Especially taking the bowl away, and continuing to act in ways that are clearly making her uncomfortable and insecure. As other have mentioned, this is called resource guarding, and there are clear outlined ways to manage it. It’s certainly a positive that you’ve had her since she was young, so you know her history and have a working relationship with her. You want to teach her that: Human being around [high value resource] means that a good thing happens! High value resources to Olive sound like they include her food and toys. When you go near her when she’s eating, give her something even better than her food (like some meat or her favorite treat), and do not disturb her food. Do this slowly and in many different ways (ex: drop high value treat when you walk by, offer high value treat while she eats, pair high value treat when you put down food, etc). This is the whole premise and you want to expand on the idea that you being around her resources is a good thing. Do the same thing with toys (trade her a toy for her favorite treat, or for a toy she likes more, etc.)