Thanks everyone for your replies!
We were not told about this when we moved in, only that the shoot operated "nearby" the first year we lived here, we woke up to find 4-5 landrovers parked outside our kitchen window! with the men all walking around our garden!
We complained and they now park further down our track (we are the only house down a bumpy dirt track)
However they still walk past our kitchen window, around our chicken shed and up into the field, the field has very short grass but thick cover and hedges all around it, which they beat the pheasants out of and towards their field.
Seeing my two little kunekune boars run up to greet these people at the top of the field, only to run back down screaming in fear after they started shooting was really sad

We have called a meeting with the estate manager and game keeper and will see how it goes, if they have been walking across their for the "20" years and we cant stop them then we will move, as yes the shooting stops end of january but from next year I will be lambing beginning of january.
Possibly we can cut the cover/hedges right back and move all our fences to right up against them, leaving nothing for them to beat at and nowhere for pheasants to hide!