When sheep walk into equipment, sensor get weight 
Transfer weight data to computer,
After compare sheep weight and Preset data.
Big sheep, middle sheep, little sheep get out from middle, left and right door

(Right is exit )

(Right is entrance)

To tell the sheep position to computer.

With water repellent treatment and sealing treatment 
All the pipe is UV proof

You can set the parameter to control all the motor.
New company add pilot lamp to tell owner its working condition.

Powder is provided by air compressor.

Can be connected with office computer to store data.
Save more work for owner.
Gas flow detector (blue part)

Floor is 2.3mm checker plate.strong and skid resistance design.

Bare bold in corner is covered by plate to protect sheep