We had the vet come check Sail out. Our easy keeper just hasn't been drinking any water in this heat. (He drank but not enough). He wasn't dehydrated (yet), but we went ahead and gave electrolytes and, electrolyte paste, which didn't seem to make him want to drink any different. Big ice cubes in his water didn't work. (They are terribly spoiled). He then developed a fever, legs a little puffy, so we became concerned - call the vet. He has a virus. We separated the horses in different pastures for a couple of days. He's back to himself now. Little heat stress. Cha-Ching to the Vet.
The ride is over; cool down done, time for a shower!