How many times have they knocked them over?
Right, but they haven't got to them while they were on? I think my much smaller leopards would walk right through them, at least try, like they do my little trees and the fence. Plenty of room to go around them, but they rather squeeze between the two~ They can't, the actual spray nozzles retract into the ground after the water pressure is shut off by electronic valves that are on a timer system.