Electro-immobilization versus mechanical restraint in an avoid-avoid choice test for ewes.

Area of Science:

• Animal behavior
• Veterinary science
• Animal welfare

Background:

• Assessing animal handling methods is crucial for welfare.
• Electro-immobilization and squeeze-tilt tables are common restraint methods for sheep.

Purpose of the Study:

• To compare the aversiveness of electro-immobilization versus squeeze-tilt table restraint in pregnant ewes.
• To determine sheep preference between two common restraint methods.

Main Methods:

• A Y-maze avoid-avoid choice test was employed.
• Pregnant ewes were offered choices between electro-immobilization and squeeze-tilt table restraint over successive trials.
• Three commercial electro-immobilizers were evaluated.

Main Results:

• 56% of ewes avoided electro-immobilization after initial exposure.
• 94% of ewes utilized the squeeze-tilt table after experiencing it.
• Ewes showed increased willingness to use the table with experience but hesitation after combined restraint methods.

Conclusions:

• Electro-immobilization is significantly more aversive to pregnant ewes than squeeze-tilt table restraint.
• Squeeze-tilt tables are recommended for sheep restraint to minimize animal stress and improve handling.
• Understanding animal preference is key to implementing humane handling practices.