Not walking a dog regularly can lead to several health risks beyond just compromised physical fitness. Inactivity increases the likelihood of obesity, which can precipitate diabetes, joint problems, and cardiovascular issues. Lack of regular exercise can also exacerbate behavioral problems, including aggression, anxiety, and destructive behaviors due to pent-up energy. Furthermore, insufficient mental stimulation from walks can lead to depression and a decline in cognitive function, particularly in older dogs. Regular walks are crucial for maintaining both the physical and mental well-being of dogs.