For example, breeds with a high energy / work drive living with a sedentary family providing minimal stimulation are much more likely to suffer from anxiety, obesity, and other health issues, or may develop destructive behavior patterns. (ahna.net)
A Mastiff left alone, tied out, or kept in a fenced yard with too little human company, will either pine away or develop destructive behaviors out of loneliness and anxiety. (mastiff.org)
Since they are so dedicated, it is important to note that if left alone for long periods of time, they are more prone to developing destructive behavior problems than other dogs due to extreme separation anxiety. (petpremium.com)