Guillotine or sliding drop gates use a trip wire to trigger the door to fall.
Guillotine trap door trigger.
The guillotine door raises up to create an opening into your trap and falls straight down when it s activated.
Rooter lifting gates require that a hog use its nose.
This is not a continuous trapping door once it s closed it s closed until you come and manually open it or reset it.
Rooter lifting head gate on box trap.
Photo courtesy of texas agrilife extension.
Therefore it is extremely important that the trap be strategically baited to insure that most if not all of the pigs in a sounder have entered the trap.