When I had GSDs I used to use a bucket in the shower to water them because they were so messy, of course I didn’t have any short legged dogs back then, so that wouldn’t help you. But it does sound like the rocks need to be in the water for ten hours to work. If you only changed the water before bed then they could soak over night.
I found their website to be a contradiction. They say the rocks work by filter out metals such as tin that are in the water, but if water isn’t going through the rocks, they aren’t filtering anything. The website he linked to about why spots occur didn’t say anything about metals at all, it said nitrogen was the cause. I would want to know what the rocks are actually adding to the water before I tried it on my dogs, but they very carefully didn’t tell you that. I wouldn’t try them without knowing more, JMO.
