I currently keep a 5 gallon waterer outside in the run under the shade and a dog bowl inside the run. I treat the water with vitamins and AVC, but I'm going to wean off the vitamins soon. They are expensive and I'm wasting a bunch when I dump the waterer out. Right now I'm changing the 5 gallon waterer about every 2-3 days unless its scorching hot, then daily. The dog bowl gets fresh water everyday. I have a waterer that I can hook up to the hose and it will continually give me fresh water daily, but I do not have it hooked up in fear the iron/mineral pieces will clog it up. We have a well with water full of iron and minerals.