Biomechanical problems are often the result of the accumulation of everyday activities such as running and jumping and can effect any dog, but for working dogs each discipline requires different standards and puts a different strain on the animal resulting in problems:

Agility is a high-impact sport and dogs can injure themselves due to over-enthusiasm, slipping on turns or due to repetitive concussive forces on landing and weaving places increased stress on the inter-vertebral discs.

Obedience handlers often notice slight problems such as fidgeting in stays or puppy sitting which can suggest discomfort in the back or neck, which may be a result of repetitive strain on the dogs spine during heel work.

Working trials and Schutzhund dogs have similar problems to agility and obedience dogs as well as jaw problems related to man work.

Flyball dogs will almost always turn the same way off the box, producing asymetrical forces on the spine.

Gun dogs need stamina to work all day in difficult conditions, a dog that is trying to compensate for underlying problems will fatigue quicker and be more prone to injury.

Show dogs may develop gait problems such as not moving straight or looking uneven; although they are not lame the problem is significant enough to impact there performance

Credit for some of this information must go to Corrie Elliott as while I can assess and treat any biomechanical injury my knowledge of competitive dog activities and therefore the probable mechanism of injury was limited