I think I managed to read or skim over all the past posts and threads on long coats but I haven't seen much of this discussed yet.
It seems most say you can't tell if a puppy will be a long coat until they are 7 to 9 weeks old. (assuming that both parents aren't long coated and are just carriers for the recessive gene.)
Why do some puppies seem to show long coated characteristics early on and have them vanish by age 7 weeks? ex: The fluffy ears or the slight wave of fur along the faces and back diminish, suggesting the dog will have just a plush / stock coat.
Do these characteristics ever come back again?