I hate the leave it command! As Missbattenburg says people bellow it with such verocity the poor dogs dont now what has hit them. Generally they stop out of surprise not because they know what LEEEEEEEEAAAAAVE ITTTTTTTT means
or the alternative leave iT said very loudly and very quickly with the T spat out with great force.
I even went to a training class where they were taught to practice saying it loudly and aggressively - what was interesting though was that the dogs were doing an exercise with cooked chicken on the floor. All that the dogs learnt in that lesson was to grab the food really really quickly and swallow it very very fast.
Think about what you want the dog to do when you bellow leave it?
Generally it is stop and look at me.
so
why not just say their name - all dogs need a good reaction to their name. If I just say my dogs name they look at me, whatever they are doing so work on this rather than leave it.
Or you may want the dog to leave it and come back to you
So
just recall your dog no need to bellow ,a good recall is way better positive and happy.
You may want some dogs to Stop rather than leave it and again a much more versatile command.
A positive interrupter can be used for anything, as well as getting the dogs to leave or stop what they are doing eg just checking in with me, if dogs are happy to check in with you then again the need to be picking up bits and pieces will also drop off. Or a positive interrupter to change direction, to look at you etc. Again a happy positive command which dogs are much more willing to repeat
I can never ever see the need for leave it.
YohohMjojo reward your positive interrupter with bread - job done 