I had the misfortune of bumping into a muntjac deer a few weeks ago. Impact speed was under 30mph and the deer ran off however the MX-5 thought I’d hit a pedestrian so the Active bonnet was triggered 
Off the car went to the insurance body shop and 3 wks later it’s fixed and resplendent in my garage. I have a printout of the parts cost which we were charged to the insurance company at standard RRP = £3000.
Defensive driving can anticipate and avoid much but a spaniel-sized deer falling onto a single track road 2m in front of the car is a bit much.
As a consequence, I would suggest considering having protected NCD 
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