Wildseed - I actually had a net fence about 5 ft high. I guess they jump over it. I will try to set some cans/bells to make noises. As for live wires I don't think I can do that. I may shock myself.
Masala - I don't know why they nibble at the plants, I end up tearing a bit in the morning time when I saw what had happen for the last two yrs.