Dogs need an environment that is rich and varied to keep them alert.
The absence of stimulus can lead to boredom and behavioral problems such as dermatitis from licking (usually a wrist), bulimia, or potomania (excessive drinking).
The other extreme can also be dangerous. Too much stimulation can cause hormonal problems and nervous disorders such as weight loss, diarrhea, behavioral problems, reproductive difficulties, poor socialization.
A compromise must therefore be established somewhere between the complete absence of stimulus (idleness is the root of many problems) and asking too much of the dog (which overwhelms the animal).
This balance can be found in the regularity of meals, visits, and relaxation time, and by maintaining the dog's area and its choice of audiovisual stimulation.
Even if sound perception in dogs (65 to 15,000 Hz) is not comparable to that of humans, the diffusion of these waves can play a role in the socialization of puppies. Reducing external noises and the stress felt by the people caring for the dogs can involuntarily improve the dogs' well-being.Let us mention here, with all reserve, the results of Dr. Diotalevi's studies (an Italian veterinarian), which showed that the majority of dogs preferred opera tunes and folkloric music.A knowledge of the colors dogs see can also help in the choice of paint. Though it is now well established that dogs see blues and greens in red light better than humans do, and that they see better in darkness than humans do, nothing has been shown as to what effect the color of wall coverings in their boxes may have on behavior in kennels.