Possible Clues:

• Shells coming from this egg-farm
• Henhouse often linked with 10
• Power cell
• Where the guns are in current use (for some foul purpose, by the sound of it?)
• Remote power source
• Might be charged but not 17 down
• One needs to be charged with foul ovecrowding, by the sound of it
• There ought to be a charge for this
• 9-volt, e.g.
• May be charged with assault