The nine year old is a leisurely retriever, but she knows her business, and if she sees a duck fall, it is HERS. Takes her a while to get to the long ones, but she gets there. Where she falls down is handling -- "who the heck is the bird dog here, and why are you telling me where the duck is? By golly I can find it by myself with my superior nose, thank you very much."
The two year old is a loon - more like a little racing car than a tank. She gets so excited on the line that she doesn't always mark accurately, but hopefully that will come with time and experience. She handles like a Ferrari.
Have enough trouble persuading her to give up her duck without letting her win a game of tug.
You made me laugh. I could visualize all of that.