[JoeyP]

lol ... I don't want to get into the middle of a full scale war

But puppies do use play as an aggression device
Your older dog is being aloof because she doesn't want to acknowledge this little upstart

I had a dog in the past .. a Min Pin
and we brought in a new puppy after four years of her being the one and only

She wouldn't even LOOK at the puppy for months
when the puppy would come in the room the older dog would leave
I think your puppy might be trying desperately to get some attention from your older dog
and it now has led to out and out aggression
Bring the dogs together into a room
you have one
and someone else be in charge of the other
with the puppy everytime she looks at the older dog with out aggression praise her and give her a treat
if she growls or tries to run over to her stop her with a quick sound to catch her attention
with the other dog it's the exact opposite
everytime she looks to the puppy praise her
and slowly increase the closeness over time
you might want to limit the puppy's access to the older dog for a while
so this can take root