i have a question about the color of my well water, i had bought my first home a year ago and it passed all inspections,the home was built in 1958, has new water heater, and the bladder tank looks fairley new,when i run the cold water to fill a bucket up,it comes out clear,and stays clear for a little while, then it gradually turns a rust color and stains my dogs stainless steele water dish,but when i had used water softner pellets it doesnt seem so bad,what causes this color change?and is it harmful for my dog to drink?and when her water sits for a few hours, she refuses to drink it but will drink fresh water when offered,any answers to this is appreciated, as i know little about well water, and where could i get my water tested at?