Modified Forssell’s operation for crib biting in the horse.

This study investigates the effects of an adaptation of Forssell’s procedure to treat crib biting or wind sucking in horses. The modified surgery, which involves the removal of certain nerves and parts of specific muscles, resulted in complete cessation or significant reduction of these behaviors in a majority of the treated horses with minimal recovery complications.

Objective and Methodology

• The objective of the study was to test an adapted version of the surgical Forssell procedure to treat crib biting or wind sucking behavior in horses. Crib biting and wind sucking are behavioral problems in horses that can lead to significant health issues.
• The modified Forssell procedure involved bilateral neurectomy or nerve removal of the ventral branch of the accessory nerve. It was also combined with the excision of portions of the omohyoideus, sternohyoideus, and sternothyroideus muscles.
• The study was performed on a sample of 35 horses that had a history of crib biting or wind sucking. Post-operative observations lasted at least 12 months for each case.

Findings and Conclusion

• The results showed excellent outcomes in reducing or eliminating the vice in horses. Twenty out of thirty-five horses ceased the habit entirely, eleven horses showed a significant decrease in the frequency of the behavior, and only four horses continued the behavior at the same intensity as before surgery.
• On the safety and aesthetics side, minor complications from wound healing were noted, and the cosmetic outcome post-surgery was deemed excellent in most cases. This indicates a low risk of adverse effects and high acceptance rate among the owners.
• The researchers concluded that this modified surgical procedure is more effective than just neurectomy alone and does not result in disfigurement like the original Forssell’s procedure. Hence, it presents a promising solution for addressing crib biting and wind sucking behaviors in horses.