I have answered this post on the visitors question forum where you originally posted it.
What do you mean by "aggression"?
Why is castration an issue?
There is a difference between "not interested" in playing and "no longer" interested in playing.
And as I said in my original post what would have been your viewpoint if the positions had been reversed?
Maybe the otterhound owner " was really concerned at the aggression shown by the labrador" ?.
"my dog does come back when called but may take longer if he is enjoying himself" ...........that is not coming back when called!
If you do not have total control over your own dog is it reasonable to expect more of others?
Just curious.
As I said in my original reply, one cannot make a reasoned judgement through the ether, we were not there and one person's "aggression" is another's "frustration, boisterousness" etc depends on a lot of things, your experience with dogs, normal male interplay etc etc etc
Otterhounds are not exactly top of the list when it comes to "aggression"