You could force a welcome... hold the pup and allow Dudley to sniff his butt while you're holding him so Dud feels safe and free from attack... Then reverse and allow the pup to sniff Dud's butt while you're holding Dudley..... just a formality but once done seems the ice is broken... If it doesn't help... no harm done....just continue to make the Dudster feel like a King!
