DesertUSA.com/mb3

Drought conditions across the West have impacted rangelands, leaving little water and forage for animals and livestock, prompting the Bureau of Land Management (BLM) to undertake targeted actions, such as providing supplemental water and food for wild horses; reducing grazing; and enacting fire restrictions. Hot, dry conditions continue to persist west of the Mississippi River, with at least 15 states experiencing drought.

I agree with ya Jim. A friend has a small pond about 50 feet in diameter. It is feed by the local ground water table in Wickenburg. I figure it gets it water from the Hassayampa River, which flows underground most of the year on its way thru Wickenburg.
He has had the pond their since the early 1950's and has never seen the pond so low!!!

Seems to me if you go feeding those feral horses during drought years, you're also encouraging their continued overpopulation.