My horse is 19, we don't compete or meet lots of other horses so I'm considering making next year her last set of vaccinations. If she had a big injury I could restart Tetanus. It got me thinking about 'flu though.
In 30 years of riding I've never come across a horse that actually has flu. Is this because of 'herd immunity ' or is it just not that prevalent when your not in the racing/polo world? What are your experiences?