Inspector Richard Quinn, from Cumbria Police said:
"The dog is currently in our care. Because a child is involved we need the full facts before we can determine what should be done with it.
"At this stage we haven't had an opportunity to interview the parents but we believe this may have been a terrible accident."
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A look ahead at the forecast for the Border region
A selection of some of the best sunrise pictures from across the region, sent in by ITV Border viewers.
Chilly start. Some frost in places, icy patches possible too. Cloud and sunny spells today, hazier in the west later