Chihuahuas can usually live with other dogs and cats without problem. They get along particularly well with other Chihuahuas. It is important to socialize the Chihuahua as a puppy to prevent overt aggressiveness. Small children may regard the Chihuahua as a toy, and their teasing can cause it to snap or bite. It is preferable not to leave the Chihuahua with children under the age of 12, unless they are well taught or supervised.