Attention fluther shoppers...can you help me find something?

No, I don’t have a blue light special to offer. I’m looking for something and need help from people who are better at searching than I. I’m looking for a large bowl or bucket that can attach to a hose and use a float system to keep it full without overflowing. The goal is to have a means to water the dogs outside without constantly filling the bowl/bucket. Any help would be so appreciated. I should say I don’t know if such a thing exists. I just started thinking it would be useful when I was fixing a toilet in our house yesterday. I started thinking about the float system in the toilet and applying the concept to a water bowl/bucket.