Seriously??!!
How is that ANY different from a dog crapping in the woods like it already has done for many thousands of years? All I've done is move it off your path...
I mean, if saving da ickle birdies is your thing, surely a fox transmitting salmonella from a contaminated water source is more of a risk than a domesticated dog?
What about rats carrying MRSA from feasting in hospital refuse piles and down the sewers?
What about the mice that have picked up a whole cocktail of poisons and detergents from our kitchen floors?
What about all those wild animals that banquet in our bins, and then go **** in the woods?
And if you're worried about a leashed dog transmitting a human disease into the wild, why aren't you out hunting down every unleashed cat (which is most of them), since they can be infected by and transmit the exact same diseases??!!
Now talk to me about being sensible...