In the common area between the two fields, your dog will be able to see the dogs on either field. You can walk your dog towards one field or the other and observe the action between your dog and those already in that side. If there are concerns, walk to the other side. Sometimes it is better to seperate young and old regardless of size. You can always visit, park, and walk up to the fence to assess the layout before you invest.
No, but most people are good at separating. There is two fields shared by a common entrance. Each field has its own entrance from that.
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