pvs14 on my remington 223

went out last night with my pvs14 on my 223 sheep are not fare of dropping there young and need to be watched i was looking round with pvs7 goggles when a fox appeared on top of the hill . tried to sneak up closer but he started to run waited a bit longer and another fox turned up but was among the sheep and i could not take the shot will have to keep going back till i get them