What is a key factor that causes a horse to be ineligible to race in a different meeting?

A horse being ineligible to race at a different meeting due to being claimed is grounded in the regulations and procedures that govern horse racing. When a horse is claimed, it indicates that ownership has changed hands, and this can affect eligibility based on the rules set forth by racing authorities. Typically, after a claim, there may be restrictions on racing the horse at different tracks or meetings for a designated period. This ensures compliance with newly established ownership, allows time for necessary paperwork, and enforces consistency in horse management.

The other factors, while important in the context of horse racing, do not directly lead to ineligibility for competing at different meetings in the same way that a claim does. Not being tattooed, switching trainers, or weight requirements relate more directly to individual compliance and eligibility at the current meeting rather than affecting the horse's status across different venues. Each of these points plays its role in the overall framework of racing regulations but does not carry the same implications as ownership changes do regarding a horse's ability to compete elsewhere.