Addiction is defined as a chronic, relapsing brain disease that is characterized by compulsive drug seeking and use, despite harmful consequences. â  It is considered a brain disease because drugs change the brainâthey change its structure and how it works.ource: From the laboratories of Drs. N. Volkow and H. Schelbert. Addiction is a lot like other diseases, such as heart disease. Both disrupt the normal, healthy functioning of the underlying organ, have serious harmful consequences, and are preventable and treatable, but if left untreated, can last a lifetime.
there is a dog from Africa called a Basenji, it doesn't bark, it sorta yodels. and also the visila from south America is said not to bark Please don't listen to all of the smart arses. Deaf dogs bark very little. But all dogs bark.
The Mastiff is a very massive, powerful, muscular dog. Dominance levels vary, even within the same litter, but it is often called a gentle giant. A born guard dog, the Mastiff rarely barks, but it is in its nature to defend its territory and family, and is more a silent guard rather than a barker. When an intruder is caught the dog is more likely to hold them at bay, either by trapping them in a corner or lying on top of them rather than an all-out attack.