The gap between those wires would look like a gate to some cows. Once their head goes through, the shock may or may not back them out.
For wildlife, make the fence as visible as possible. Only a few of them will be around it enough to get used to where it is like the cows do. If they can't see it they'll run into it, and drag it halfway across the county when they panic. Sometimes they'd run into it if it was covered in strobe lights, but anything you do will help.
Is the gap too wide? I put the lower wire for the calves. Should I raise the bottom wire?
I always want a wire where their nose will be. For cows and calves, I generally string one just below my knee cap and one just about where my fingers end when my arm is hanging at my side. That way if the calf is head up walking the top wire gets them in the face or chest, and if they have their head down checking it out the bottom one gets them in the nose.
I can stop my cows for a good while by stretching a string and painting a line on the ground with marking paint. Once they look at it I can take the string down and the painted line holds them back.