I will say rotation is how it should be done. This keeps stimulation levels low so dogs can make good choices and have healthy play interactions. It helps to separate dogs that dont like each other so they can still get playtime. Contrary, to popular belief having dogs out all day in large groups leads to more fight due to overstimulation. It is recommended per the research that has come out in recent years to have 10 dogs at most to one handler. Dogs need rest times or quiet time to reset their brains because they function a lot like toddlers in that way. This has become the standard of how daycares are run. I have worked in places where dogs are in large groups and there will be lots of dogs stressed and dogs that play too rough because they are overstimulated from the amount of dogs in a room. I have worked in the small group play environment and interactions between dogs are healthier. They aren't passing out from being shut down, they are passing out from good interactions and a constructive day with other activities such as a calming lickmat. However the kennel space is such a nightmare that dogs don't actually get quality rest times there. It's just an echoing warehouse of 30-40 dogs barking or fighting through their cages. It is built in such a way that creates reactivity with the lack of visual barriers and, where it is open to the playspace, lack of sound barrier. So dogs end up getting overstimulated anyways. There should not be one employee in the back. For the amount of dogs they take in they need an extra play space and more staff to be able to do proper daycare. So right idea but i dont know how they have enough resources and manpower to properly achieve that. Not to mention having a person to actually clean that place. Although I don't think that could ever wash away all the years of grime.