Bramble first did a 'cock-a-leekie' at 6 months (there was a pile of new mown hay in the meadow up against which he performed!!). He has no role model, living with Barley, and even though I suggested to Jeremy that he may like to take Bramble out into the garden and actually show him what blokes do, this was met with not a little resistance !
He was neutered at around a year old, and occasionally cocks, but mostly he squats. When he does it (which thankfully is not up against the car/ plants etc. it is unusual enough for us to comment on ....
Maybe it's because he doesn't feel territorial amd still wasn't old enough to understand the doggy scent thing ....
Ask Doctor Dolittle ...!