The purpose of a thorough warm up is to

The goal of warm-up is to provide a transition from the body that was at rest to intense movement.

Explanation:

The practice of warming up before doing a physical activity is a consecrated and consensual habit for both experts and exercise practitioners.

When we start an activity from the resting state, our body will transition to a state of greater metabolic activity, which requires a series of adjustments in various organs and systems, this transition is the responsibility of warming up. The main objective of this transition is to provide the movement effector, that is, the muscle, conditions to produce more energy and adapt this energy produced to the exercise requirement.

again, you should probably take him to the vet. goodluck