Modified Z-bar shoe eliminates occasional frog bruising accompanying Z-bar shoeing for navicular syndrome management in underrun-heeled horses.

This study presents a modification to Z-bar horse shoes to minimize occasional frog bruising and improve lameness in horses diagnosed with underrun heels and navicular syndrome. Through application of these modified shoes over time, substantial reduction in lameness, without medication, was observed.

Research Objective and Methodology

• The researchers aimed to address the issue of occasional frog bruising and moderate lameness seen in horses diagnosed with underrun heels and navicular syndrome. This condition was observed following the usage of standard Z-bar shoes.
• The study was conducted on two horses showing these symptoms after the 6th and 10th consecutive farrier adjustments. The researchers studied the sensitivity of the hooves to compression of the frog and sole in their palmar areas, indicating bruising or discomfort.
• The researchers then developed modified Z-bar shoes, based on prior regional anaesthesia and recent clinical examination. These were then applied to the lame legs of the two horses.

Findings and Conclusion

• The study found that immediately following the first application of the modified Z-bar shoes, a slight improvement in lameness scores was observed.
• Four to eight weeks after applying the modified shoes, the horses showed marked improvement in lameness scores without any additional medication. This confirmed the effectiveness of the modified shoes in reducing discomfort and improving the horses’ conditions over time.
• The findings suggest that the modified Z-bar shoes have the potential to alleviate the negative impact from underrun heels and navicular syndrome by protecting the palmar structure from damage generally brought about by the regular Z-bar shoes.

Implication and Future Scope

• The indication that the modified Z-bar shoes can reduce pathogenic impacts deriving from underrun heels and navicular syndrome presents an avenue for further research and improvement in horse shoe design.
• The fact that marked improvement was observed without any medication suggests a reduction in medical intervention and possible cost savings.
• However, this study was conducted on a small scale with just two horses. For stronger scientific evidence, larger scale studies can be done in the future.