It would be very easy to have septic sprinkler heads redone to the front along the fence. I would do that, not for contamination reasons, just to get it out of the way of the pond, dogs won't be chewing on sprinkler heads, they/you won't be walking trough the water sprayed out, it will increase the size of your enjoyable area.
I won't work on someone else's pond to "share" You can get too much money invested for it not to be yours.
