I successfully called in a Fox on Saturday - it was about Midday and was talking the dog for a walk, but took the rifle just on case. Spotted a fox 200 yds away going over a drystone wall. Got onto the fox call and about five minutes later I spotted her sitting watching me about 100 yds away. Needless to say she received a 7mm bullet through the white bib and won't be taking any lambs.
I have often given a few squeaks on a fox call but if I haven t seen any thing a few moments I move on - but probably in most cases too short a time.