I have five, all pets, all fixed. Harley is 8 yrs. Rita is 6 yrs. Scooter is 1 1/2 yrs. Bandit is 6 1/2 months and Peanut is 6 months. They all eat at the same times, same food and use doggy doors. Bandit & Peanut are about 50% house broken, they rest are 100%. They are like kids, if you raise them right, it's not more bother to have 5 than 1!