The word "compulsive" means having a strong and uncontrollable urge to do something repeatedly, even if it is difficult to resist or might not be beneficial. Full definition
The onset of obsessive compulsive disorder usually corresponds with social maturity in dogs, which typically is between one and three years of age, depending upon the breed. (petwave.com)
Some dogs eat grass because of obsessive compulsive disorders, but that is usually very rare. (whydoesmydog.com)
This work holds promise for enabling earlier diagnosis and treatment of compulsive behavior disorders. (mcleanhospital.org)