All leaves gone off sweet potatoes

This is my first year growing sweet potatoes so I dont know much bout them. My plants where growing amazing and I planted them as soon as the stores had slips in stock. But here in the past couple days I see that all my leaves have been removed from all of the plants. I was wondering if you could help me out and let me know what I should do about the plants? Are they done growing or will they grow back if I keep the deer away from them? Or should I go ahead and dig them up, I live in Central Va so we are still a little time before the first frost. Kinda lost as what I should do about these bare plants any information would help out a lot. Thank!!

moderator's note: corrected subject line using proper combination of upper and lower case letters

moderator's note: moved topic to more appropriate forum

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