Here's some tips on how to make stress work for you. To listen to stress counsellors you'd think the problem of stress was new. Stress has been around since man first identified time. From that moment on, he suffered.
Pressure is the awareness of something demanding extending into the future.
Without the last bit, the future, there is no pressure. We know very little about the suffering of animals. We know that they do suffer but anecdotal evidence suggests that they suffer in direct relation to the capacity of their brains. Now an animal with a very small brain probably has very little concept of time. Animals with larger brains are more aware of time passing.