A dairy farm foot bath is almost exactly like that. It’s like a kiddie pool that the cows wade through when they leave the parlor. (All dairy farms do this.) We put copper sulfate in it. We can’t use it when it’s super cold, because it freezes, and then the cows exiting the milkhouse would look like the ice skating scene from Bambi.
We have a relatively new one. The last one was so small that the cows would sometimes just step around it. This new, bigger one ensures that it bathes all four hooves as they walk.
Unfortunately, ours cracked. Now we need to get a new one, because it’s really important that the cows get their feet treated. Why? Because the copper sulfate reduces the incidence and severity of hoof rot and hairy heel warts.
Yes, you read that right. Go ahead, look at some pictures! You’d do all you could to prevent that too. They’d never let you back in the spa.