In many areas the story of the animal sciences is one of ongoing improvement. Whether it is slow and incremental or in fits and starts, we learn to do better. But when it comes to designing environments that suit the psychology of animals ("environmental enrichment") I think we would gain a lot by going back to some of our earliest efforts.
In many ways this facility from over a century ago greatly exceeds the minimum standards required, and actual conditions achieved, within a great many dog-housing facilities today. Some of it is because of the pressures of the modern world in terms of security and disease control... but it goes to show, there might be as many good ideas in our history as our gleaming scientific data of the future. After all, what a familiar domesticated animal like dog needs is often more a matter of common sense than objective data. What differs is our willingness and ability to properly provide for those needs.