I know fallow, reds and even muntjak can cause problems for a dog, but I heard Roe are more of a low risk ??
Have never taken roe, as we done have them here, going by some descriptions and story's of dogs taken them, they do seem easier, but like i said, i have never taken them.
Fair play, well I think that's the only deer that I would run, if your dog takes one of those I think that's good enough in my eyes.