A Hole in the Net and the Fish Was Free

A farmed salmon
Slipped through a hole in the farm's net
And roamed free for a while...
But lost its nerve and looked for the hole 
To go back to the farm.
It was just about the time for morning roll call
And then breakfast, scattered on the water...
It was pretty humdrum on the farm...
Roll call three times a day
And a feeding frenzy for a share of bland meals.
But, at least, 
There was no brutal swim upstream to spawn,
Through a gauntlet of hungry bears,
Clawing at the water.
    I'm telling you, that is scary.
Plus the farm's water is a tad warmer.
So exchanging bears and cold water
For guaranteed food and warmer water...
Well, it's an easy call.