What was Black Beauty missing while living in Birtwick Park? Do you agree that horses live only to serve humans? Why or Why not ?

I think Black Beauty was missing a real emotional connection with someone at the park. Black Beauty also missed the freedom of roaming and doing what wild horses do. The latter part of the question is asking for your opinion rather than mine.

I think was missing liberty which he enjoyed while living in Farmer Grey's farmland.Horses don't live to serve humans,they have their own rights and they have the ful liberty to enjoy this rights.