Does your dog wear a collar during this time? Does she has a metal bowl?
If it is so, maybe she is sensitive to the (metal) sound the collar makes with the feeding dish...
It could be a kind of negative link she has got with it. Have you tried to put the bowl somewhere else, does she show the same behaviour? Maybe it is just the space around her and she will act totally different in other surroundings. Try it.
Outside, inside, kitchen, garage...watch her and tell us, how the behaviour of her is changing. Feed her on different times, in the morning in the evening...try another bowl, another person.
What is she doing, when you hold the bowl in your hands? Is it the same thing or can she then stay/remain during her meal?
Only when you have tried everything out, then you can imagine on what her attitude depends, if it is stress or if it is the bowl or the person or just a quirk.
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english version