Limitations
While these barriers are usually effective, they can fail due to ingenious animals. Sheep have been known to jump or run along the side of grids as wide as 8 feet (2.4 m), traversing them to find more and better food or water. Wider grids are used where deer are to be contained. Some animals, particularly wildlife, can jump across them, and animals with particularly large feet, such as American bison or even particularly large bovine bulls, can walk across them without slipping between the bars. Sometimes, they may be connected to an electric fence to prevent predatory animals, such as dingoes and foxes walking over them. In areas with heavy snowfall and long periods without a thaw, snow can accumulate beneath a grid and allow animals to walk across. Portable "Texas gates" suspend the gate by springs so that it lowers to the ground when a vehicle passes over then returns to a position 6 inches (15 cm) above the ground to avoid the snowfall problem.
Read more about this topic: Cattle Grid
Famous quotes containing the word limitations:
“Growing up means letting go of the dearest megalomaniacal dreams of our childhood. Growing up means knowing they can’t be fulfilled. Growing up means gaining the wisdom and skills to get what we want within the limitations imposed by reality—a reality which consists of diminished powers, restricted freedoms and, with the people we love, imperfect connections.”
—Judith Viorst (20th century)
“No man could bring himself to reveal his true character, and, above all, his true limitations as a citizen and a Christian, his true meannesses, his true imbecilities, to his friends, or even to his wife. Honest autobiography is therefore a contradiction in terms: the moment a man considers himself, even in petto, he tries to gild and fresco himself.”
—H.L. (Henry Lewis)
“That all may be so, but when I begin to exercise that power I am not conscious of the power, but only of the limitations imposed on me.”
—William Howard Taft (1857–1930)