Trial Deer and Rabbit exclusion zone

I have built a fenced off area which deer and rbbits can't access. The basic idea was to prevent predation of ochids without having to cage each individual ochid spike but there are interesting side benefits. This year the fields look less plump with grasses and flowers. I think this may be partly a weather/climate thing but also the numbers of rabbits and deer keeps growing - particularly rabbits this year as the Myxie has not been around for a couple of years. Also the preponderance of hemiparisitic flowers has been growing particularly Eyebright so there is less volume of grass. Interestingly the caged off area looks much richer than the surrounding ground and that effect can only be due to the grazing of the field.