<human>: Condense the text into a few key points

I've been doing research on and off on what breed I would like to/can get and their various needs for when I can get my own dog. This isn't for any time soon but I like to be prepared for this kind of thing. Anyway I'm really interessted in training my dog in obedience and building a trust relationship with him. For this reason I'm kind of weary of getting a retriever because of their prey drive. I'm worried that their prey drive would cause them to run of at the first sight of an animal and potentially cause an accident.

Our current family dog is a Border Collie and the strength of his herding instinct took us a bit by suprise. This has come in handy though as he just needs to see a ball and then he only has attention for that but it makes me even more aware that this is something to keep in mind when choosing a dog.

I'm specificaly looking into the Golden retriever and the Nova Scotia Duck Tolling Retriever. Do these breeds have a strong prey drive? Is this something that can/has to be managed with specific training? I've also heard from a hobby dog trainer that retrievers tend to be stuborn in a 
"you have no treat so I won't do what you ask" kind of way. Is this true or just a skewed perception on her part?

Anyway thanks in advance for all the responses!
<bot>: How strong is the prey drive in the Golden retriever and the Nova Scotia Duck Tolling Retriever? Can you depend on them not to run of at the first sight of an animal? Does this need to be trained in