I am concerned about our one year old chi (Gus). We just lost his best friend and our family dog (Ratchet, lab/akita mix)of 8 years to cancer. Since we brought home Gus at 9weeks old, him and the older dog have been best buddies. It has only been 3 days since Ratchet lost his fight with cancer but Gus is lost without him. We work during the day so when we get home Gus never leaves our side and seems sad. He will play but not like he use to when Ratchet was alive. My question is: do Chihuahua's need that companionship of another animal or are they okay as a only animal with a family. Just wondering.