Looking to purchase new commercial 2-Hole Automatic Waterer for cattle and sheep

IYO: 

What is the best 2-Hole Automatic Waterer for both sheep and cattle?  What are your experiences?  ???

I want to purchase a "commercial" 2-Hole Automatic Waterer to install on a concrete slab, and divide it with a fence line for watering sheep on one side and cattle on the other.  It will be used "year 'round".  I live in Michigan and have cold winters.  I would like some type of watererer that is "energy-free", however, I do have electric in the waterer location site, and would like to install a waterer that also has "supplemental heat", such as a 250 watt electric heat element of some type.  I have used Mira Fount E-Founts, with the blue ball, in the past for cattle, but I do not know how well they would work for sheep.

I will be making a purchase in the next week or so.

Please send me a pm. 

Thanks in advance,

Bump

ttt

We like our Ritchie.

We just put in some new Behlen waters and we love them. They come in many different types as well