While not pleasant - horse poop is basically undigested plant parts and doesn’t have the smell like dogs do.. It’s “allowed” to be left on trails etc because it’s a fertilizer, birds eat it and it doesn’t have the bacteria dog and human poop does. But I would hope the owner would
Make the effort to clean up or bury it in front of the resorts. But those horses have been on that beach as long as I can remember. Sometime hanging out along the fence by the airport.