Every 5 -6 month old pup I’ve owned has been a PITA. They’re teenagers. They think they’re independent & they haven’t been taught any responsibility yet. They can however tell if you don’t like them so don’t let your pre-conceived notions about the Chesapeake temperament affect your future relationship.
Dogs “bond” with their masters because they accept them as their leader, protector, & the bringer of good things. They lose respect when you give them treats or praise they haven’t earned. At this stage, you should be mostly concerned about avoiding bad behavior. That’s what the long line is for.
Since she drops the dummy when you pull her in, try throwing a clip wing pigeon. In many cases, the introduction to birds has made a noticeable difference in how the pup sees me. It’s like a switch goes off & they view you with a whole different attitude.