I'm posting this here, too, due to the immediacy of the need for an answer.
A VERY close relative will be obtaining a 9 week, purebred Havanese puppy soon. Our wonderful, adopted, purebred Standard Poodle is very friendly, curious, amiable with almost all other dogs and people. However, on a few occasions, when we are out walking and a unleashed "foreign dog" makes some "threatening gestures" or tries to "jump up" on us, our SP becomes instantly protective ... snarling, teeth bared, confontive, etc. until the "danger" is removed than he instantly calms down. Has not bitten yet but he does appear "ferocious" ... it has always worked to "chase away" the "stranger."
Also, he is a "hunter" naturally, points, etc. when in "nature" and on a long leash and becomes an instant "sled dog" when a rabbit or squirrel runs away from us. High prey drive, apparently, he always tries to "sneak up" on them if he sees them. He obeys, often stubbornly, of course, but still there is that instant response.
Question, finally, do we have reason to be concerned about introducing him to a small, furry, active, 9 week old Havanese puppy?