I suppose open plan has some advantages, like it is more hip (makes for great "we are a family" pictures), and the "team building" might make people less likely to leave their jobs. Just guessing - in any case there might be effects that offset the lower productivity. Otoh I was floored to read today that Amazon apparently has lots of dogs in their offices because it is supposedly good for the atmosphere, lower stres…
My company is co-located with another company and they encourage dogs in the office. My question has always been: what if you want to hire someone with a dog allergy? Worse: what if the person isn't currently local and there aren't any dogs in the office the day they happen to come in but relocate only to find they can't possibly work in that office?
Whether you read that as a feature or a frustration, it comes down to that it simply becomes another line item that potential candidates may be judging you on, and you may never know about it. (it's certainly something I keep an eye out for nowadays.)