Tell Disneyland stop over exerting their horses!

While at Disneyland this weekend, I witnessed a number of poor horses being forced to pull trolleys of people in 100 degree heat with no water. When they stopped, they would stop in the sun, even though their was shade within 10 feet. I watched as one trudged by with tons of drool dripping from his mouth. He looked very ill also. I walked up to the driver and told her, as she was sipping on her water, that she should give the horse water. She tried to assure me he was fine. He obviously wasn't fine. Disneyland has a ton of robots in their park. Using a robotic horse would be much more ethical or just get an electric trolley! Please sign to tell Disneyland this is not ok! It is suppose to be the happiest place on earth for its guests. This made me very sad.