In theory, 10% more turns will give 10% more voltage but there will be a secondary effect of additional coil capacitance. Also, making modifications to a HV transformer may give insulation problems. 10% difference in the fence voltage will be irrelevent.
You can get low voltage DC to high voltage DC convertors for little money. I got a couple but I just do not have the time to play with them at present.
You can get low voltage DC to high voltage DC convertors for little money. I got a couple but I just do not have the time to play with them at present.