The collie 'Creeping' with head held low and belly close to the ground or stopping like a lion in an ambush, its a very strong trait, and more so in pastoral breeds. Just go watch them in the field working. :yes: You wont get that behaviour displayed anywhere near as much watching some pseudo whippets sighthounds running round a field or a bunch of labradors, that's for sure
If I should hazard a guess, its way more likely to come from the pastoral blood running through a lurchers veins than anything else. But I doubt the thread needs to discuss the finer points of breed behaviour, as for