I wouldn't want to tow two horses with anything as small and lightweight as a freebie.. forget the engine power and the brking power but when a caravan takes a seide wind past a truck on the motorway it will pull anything lighter than a discovery across a lane or two no problems at all.. I can't imagine what would happen if the caravan had a couple of enormous animals in it that panicked at the same time but I guess it wouldn't end well for anyone..