Dog digging up petunias

Dog digging up petunias

I wonder if there is any reason why my dog, who has never paid any attention to my garden in the past, would suddenly start digging up my plants? I purchased some 'wave' petunias this week to fill in an new area in my garden and I have now twice discovered her digging up these plants. She hasn't touched anything else in the garden, she just digs the plant out and that seems to be it. The only thing I can think of is that she is going for the bone meal but I always plant with bone meal and it's never been a problem before. It's just bizarre. You can see where the earth has been disturbed by me replanting the petunias at the front of the border.
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Terrible happening ~ look what I just found…

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