Appropriate social interaction is very beneficial for pet dogs.
Sometimes behaviors such as chewing things, barking excessively, or eliminating indoors are actually signs of stress. Some Poodles see themselves as the protector of the family. If they feel unable to handle that responsibility, they may become anxious and develop problematic behavior.
One way to reduce stress is to take that sense of responsibility away from the dog. Let your Poodle understand that the owner is the true leader of the household. Once the dog no longer feels that it must manage or protect everything, it will relax more easily. Building this understanding usually takes time. A common method is selective ignoring: do not immediately respond to attention-seeking behavior or begging for food.
During feeding time, if the dog refuses to eat while otherwise healthy, take the food away and offer it again at the next scheduled meal. Do not keep coaxing during that period. If the dog does eat, provide praise and encouragement.
It is also not a good idea to leave a pet dog alone all the time. Let it spend time with other dogs whenever possible. Playing with other dogs helps it learn social behavior, and going outdoors exposes it to unfamiliar people, sounds, and objects. Over time, your Poodle will become less startled by strangers or noisy environments and will be better able to face unfamiliar situations calmly, which lowers stress significantly.