
Sorry about your recent loss - it will have had a terrible affect on all the household and your lad is probably still very confused.
Re your new addition, congratulations. Is she another GD?
Adult males are very often quite fearful of pups so don't be alarmed that he's not instantly taken to her regardless of how friendly he is with other dogs in general :) The 'big boys' are usually more 'big girls blouses' around those sharp teeth, high pitched squeaks and never ending zoomies that are the tiny terrorists otherwise known as puppies LOL.
He will become more used to her over a few weeks so in the meantime ensure he has time away from her and that you don't make him feel left out (difficult with the intensity of toilet training and all those extra meal times). Once he realises that she's not quite as scary as she seems now, he'll soon enjoy a few tentative games with her which doubtless will lead in a short period to many manic ones with her so be cautious about boisterous behaviour when it reaches this stage :)
My boys have always looked worried about tiny pups but have always come around with no accidents :)
Best wishes, Teri