The lawsuit was not dropped. The lawsuit wasn't dismissed. After 18 months, immediately before the lawsuit was to be heard in court, the lawsuit was settled out of court, at the request of the Romney's, in exchange for reimbursement of the sale price of the horse, Ann's name being taken off the papers legal, and no further action.
Nobody has to be a lawyer to be able to read
Watching the Obama-haters trip over themselves to defend the drugging a lame horse with painkillers to sell it is telling. And sad.