The price on the tape isn't too bad - we pay £22.00 for a 400m roll, but can't remember where from at the mo. We also use battery-powered energisers. Think we discussed this on the Pig Forum a month or 2 ago - if you can search for it, I think the thread was started by HappyHippy.
Apparently bunches of male, human hair is supposed to be off-putting to foxes, as is male urine (not necessarily directly applied
) & male dog wee (probably better applied directly
)
HTH