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Hi, I love Countryfile and would like to tell you about 2 tiny voles in my back garden. I don't know if they are safe there or need to be somewhere in the shade. What do they eat. Where did they come from. My son and I have been watching them most of the afternoon. They seem to shiver is that normal. We're so worried about leaving them. Could you please give us some advice. Thank you so much. Doreen Blake.