Can you splice wires in the middle of a wireless dog fence?
I have had several wireless fences with one being several acres where I had gates I did splice and twist the wires to make the null signal area , adding the gate areas for horses I did need to turn up the power but it still worked fine with several changes including where the brush hog cut the fence in an area it was not buried even with splices at those points and new sections added of twisted wire the fence still worked well.
Where I spliced the fence I used butt splices and filled them with silicone sealer so the splice would be dry and not corrode when crimped some of the sealer is squeezed out but this makes a really well sealed splice for low voltage I also do this on my boat and the connections last.