I have a very mature privet hedge that is about 5 feet tall and 4 feet wide. Due to its size and density – and the last two very snowy winters – it has begun to "lean" toward the street. In some areas it slumps toward the grass almost touching. It has some bare spots but for the most part it's pretty green. If we do a rejuvenation pruning and cut it back at least by half, would the privet hedge begin growing "straight" up again? Also, since it is so wide, can we prune the sides to make it more narrow? Obviously we are new at this...and at our wits' end. The hedge is huge! Thank you for any advice!