Count, you are debasing a serious and learned discussion here. Who knows, Molly might come on and ask our opinions on this self-same subject, and I would like to think that we could deliver a definitive answer more quickly than we have been able to resolve the dilemma of her father's Xmas present.
three dots is common for an ellipsis, but use as many as you want, there's no law.... [The last one there was a full stop.] Harold Pinter (a playwright famous for the long pauses between his lines of dialogue) once told an actor: 'You're only pausing for two dots; I think if you look at the script you'll find it's three.'
Puppies' is the possessive. Use it when describing something belonging to puppies such as development. Puppies is the plural, used to describe more than one puppy.