Unwanted visitors

Because of our location at the edge of the city, our new place has plenty of wild animal visitors. The most notable are the pronghorn antelope that wander in from the prairies into the suburbs to eat the greener lawns. We saw a herd close to the house during the final walk-through before closing, and then saw them frequently along the nearby streets (the first photo) after moving in.
Then we found the antelope in our very own backyard. This was wonderful at first, but then they were doing their business on our lawns - yuck! Now we want them out of our yards. We really need a fence!
In the meantime, we sprayed a "critter" repellent around the yard (for deer, antelope, rabiits, etc.). Hopefully this will work. Unfortunately we see an occasional rabbit come in to do his business in the yard. We'll do what we can to deter the unwanted visitors until the fence is up.