how do you train a golden retriever puppy who is, well, like missing his mom or something? nothing seems to work (treats, toys, etc.) and my sis is wondering if he is going to be an affectionate dog when he grows up. Please give me some advice. He really whimpers!
How long has your sister had the dog? Did your sister get this puppy from a breeder? If so, might she be able to get a blanket or a stuffed animal toy with the mother's scent on it? That helps somewhat with the transition. The other part is that your sister should make a schedule with the dog and stick to it (as much as possible) while it's young - meaning, take it out at the same time everyday, feed it at the same time everyday, play with it often (even if it doesn't want to play right now). This way the dog will know that even if she's not within eyesight, at her "appointed time", she'll be there. When the puppy knows that it can rely on her, it should calm down. (BTW, you would probably get more and faster answers if your question weren't so generalized. People need pointed information in order to best respond to you. There's no one size fits all.)
working with Retrievers though Labrador, I am fairly comfortable saying I dont think at 3 months this is a case of missing mommy. I think Raven gave you some excellent suggestions. A schedule that is consistent, total bonding time with owner etc.... Retrievers are human dogs and really need that interaction with owners.
Also, a little more information is also helpful, that's true too such as what is currently the schedule, what is going on now etc... typing is very hard to communicate suggestions by so it helps getting as much info as possible