not sure if you're asking me or Kai or BG, but, if me -
fences?
we have lotta dog parks and one of them -may- have separate areas for small and large dogs, but I have concerns with dog parks in general that I just avoid them.
the swimming pool
here we have an indoor canine swim center and training facility, owned and run by two business partners, male and female. You pay a fee for use of the swimming pool and one of the owners goes in with the dog. But I haven't taken my dogs there as one is dog-reactive and the younger one is shy of men.
no "public" outdoor swimming pools for dogs, though