On the place I hunt, they run cattle on and off....With the cattle not being there all the time the deer don't get used to them....Our place is big enough that if the cattle are hanging in the back of the place it would be wise to hunt in the front and visa versa...Our place is fenced into two sections and when they first put the cows in either section the trail cam pic's almost stop for what i consider a long time (1 1/2-2weeks)...The owners will move the cattle off the place by the opening of gun season, so us bowhunters are the only one's theat have to deal with them....Yes, cattle affect the deer...More in some settings and less in other's but they affect them!!!!!