Hello, I have a 5 year old standard poodle who gets along with everyone, a 7 year old chihuahua, a 2 year old chihuahua, and one chihuahua that is 8 months old. I need to know how much energy they have, and if they dig, and how smart they are. Please help! Also, I don't want them fighting with my other dogs. I don't want anything to cause problems. Thank you so much, and I hope to hear from you!!!!