I have noted deer browsing on evergreens before (deer-doing-bonsai). While traversing through former pastures and hay fields on Shaw Island I noted the deer have been heavily trimming the evergreens.
The trees then pass into a poodle cut phase with a bushy bottom and top and a cropped area in between at browsing height.
Douglas fir are not the only cropped evergreens. The deer also crop the junipers.
One defense the junipers use is that cropped parts of the tree become thorny. This is a characteristic of young junipers.
The stand of junipers below has a thick bushy and thorny bases and more typical branching higher up.
Below is a picture of a mixed stand of Douglas fir and grand fir along a trail route between old hay fields. Both were being browsed and heavily cropped.
Grand fir branch