Just like playing in the mud, chewing is an instinctive behavior of dogs. In fact, it needs to be encouraged as a healthy habit for the first six months to help with teething. However, dogs that frequently engage in destructive chewing have behavioral issues. Consequently, it is important to understand why your dog indulges in destructive chewing. Boredom and attention-seeking are the main reasons for aggressive chewing. But the others can be: a. Not being properly trained b. Suffering from separation anxiety c. Fear-related behavior issues Once the reason has been identified, remedial measures can be taken. Thankfully, there are many indestructible dog toys available that can withstand even the most aggressive chewers.