Avoiding Big Ends Against at Lawn Bowls

A bowls match is often lost because of one big end. Suppose you can foresee the onset of such an end; can you do something to mitigate it or reduce its probability?

I think you can. A big end against you occurs most often when:
Your lead bowls more than one short bowl
Your lead doesn’t get any bowls within 4 feet of the jack
You are shot but they have two or more seconds
You have no bowls in the head and your vice is erratic
What can you do? Stop your bowler when he or she steps on the mat with the stop sign. Signal that you need a bowl in the head. Signal for special concentration. Indicate the safer hand. The beauty of team bowls is that an indication of a critical situation is not a criticism of the bowler on the mat because it is not he or she that caused it. For this reason it does not increase anxiety it just urges more intense and better concentration and delivers better bowls when they are needed most.
What your side does not want to do is just leave it up to the skipper to get the side out of trouble. That is always possible but the solution needs to start before those last bowls.