I have two females. Both one year old. Each day I let them outside for a few hours. I am usually either out the whole time or in and out constantly. One cat stays close to home on our porch or in the backyard in the wooded area. The other one (she is actually 9 months old) insists on going down the street three houses to stalk the neighbors birdfeeders. She has about 4 birdfeeders in her sideyard!! She also has gone to the bathroom in a nieghbors planting area where they have never put any plants, just mulch. I don't want to keep her in constantly, but what other choice is there?