Comparing Horse to Human Age
infants may start eating solid food at about six months, but foals will start imitating their mothers and nibble on grass within weeks or even days after birth. Overall, all aspects of growth are much faster for a horse than a human. And although the chart suggests that a yearling horse is equivalent to a six-year-old child, that is only very approximate as a six-year-old child won't be able to feed itself or otherwise interact socially and look after itself like a yearling horse.
Horse are independent as soon as they are weaned from their mother's milk. Not so with humans who need several years of nurturing before they are truly adults able to live on their own. It will be a long time before a child can provide itself with all the nutrition it needs, especially if you consider that human food must be hunted, gathered or grown.
Nevertheless, it is fun to compare your horse's age to a human, keeping in mind that the comparisons on this, or any chart, are not 100% accurate.
So when you look at this chart, remember that it isn't easy to make a comparison between you and your horse when it comes to aging. Human and horse development and lifespan is quite different.