[Acute blindness due to trauma in a Welsh pony-colt].

The research discusses a case of a 10-day-old pony colt that went blind due to presumable blunt trauma during transportation. The trauma affected the peripheral nerves, showcasing the risk of not adequately securing young animals during transport.

Case Description

• This specific case involves a newly born Welsh pony colt which experienced total blindness a day after it was transported to a studfarm from a distance of approximately 40 kilometers.
• The pony was notably distressed during the journey and it was not secured or tethered, leaving it more susceptible to potential injuries during the turbulent transport.
• Despite the colt’s blindness, there were no visible abnormalities or damage to its eyes upon initial external examination, making the cause of the blindness initially unclear.

Virtual Investigation and Treatment

• The colt was administered intravenous corticosteroids for a period of two days. However, this treatment did not produce any discernable improvement in the animal’s condition.
• Due to the colt’s continued suffering and no notable improvement in its sight, the owner decided to euthanize the foal.

Post-Mortem Findings

• After euthanasia, both eyes, together with the optic nerves, were removed for further histological investigation in an attempt to uncover the cause of the sudden and complete loss of vision.
• The results showed Wallerian degeneration in both optic nerves. Wallerian degeneration is a specific type of neurodegenerative process that occurs when a nerve fiber is cut or crushed, and it is typical in cases of damage or trauma to the peripheral nerves.

Conclusions

• Given the findings, the most probable cause of the colt’s blindness was a blunt trauma sustained in the trailer during transportation. This was likely due to the animal not being properly secure during the trip, causing it to possibly hit its head, leading to nerve damage.
• The case study underscores the importance of appropriate measures to prevent young animals from sustaining blunt trauma during transport, such as proper tethering or other means of securing the animal to reduce potential movement and injuries.