Muntjac survival in cold weather UK 2012

Was concerned and interested about muntjac ,coming from where they do , coping with the first half of February’s weather here. The night of 10/11 th I recorded -14 C in my garden. The daytime was without much movement on 11th ’til early pm then saw animals digging thro the 8cm of snow to find the straw of old game food areas. At dusk groups of up to 8 Muntjac including a suckling fawn were to be seen eating oilseed rape leaves poking thro’ the snow . Don’t think any casualties but may have been different if snow deeper and cold prolonged ?Much easier for Muntjac to survive and if necessary have numbers controlled where game feeding continues into early spring .Chaffinches now in full song , a little later than recent years