A familiar Sound

A call in the dark 
A familiar sound 
The cows went out last evening, 
Exuberant beyond all measure 
Overwhelmed by the space
And the smell of spring grass;
Like children 
Running and jumping 
Manoeuvring  their giant  frames 
In ungainly pursuit of jollity
With unconfined pleasure
After a winter in the barn; 
Tonight unease- 
Calling into the night 
Restless
In need of security
A familiar sound.