We have a 4'x8' sheet of plywood screwed between two trees at the starting station of our trail walk - about 25yards from the firing line. We use this sheet of plywood for our fouling shots or firing them onto stapling targets. Too, we'll oft aim at a knot or simply try to hit the #1 pistol target to the right of the board, a fox silhouette - striking the tip of an ear, adding an eyeball, nose touch or a toe with our fouling shot.
Most fouling shots strike pretty close at 25 yards, but show dispersion more and more as the range might extends, of course, some low, some high or to one side or the other - it's the gun's choice and is good to know, just as one should not change from a water based lube to an oil, without deliberately testing the point of impact in relation to the sight picture.