Because there are many other species just as intelligent as dogs with which we humans do not share quite so reciprocal a relationship.

Absolutely. Because dogs cooperate with us and we with them and the other species don't.

And, perhaps it is just my pride, but I don't really think that I would appreciate being treated like a dog by my AI master.

And immediately the human prejudice comes out. We have terrible behavior when we're on the top of the pile and expects others to have it as well. It's almost exactly the same as when people complain bitterly when they're oppressed and then, when they are on top, they oppress others even worse.

What is wrong with the human-canine analogy (which I thought I did more than imply) is the baggage that you are bringing to that relationship. Both parties benefit from the relationship. The dog benefits less from that relationship than you would benefit from an AGI relationship because the dog is less competent and intelligent than you are AND because the dog generally likes the treatment that it receives (whereas you would be unhappy with similar treatment).

Dogs are THE BEST analogy because they are the closest existing example to what most people are willing to concede is likely to be our relationship with a super-advanced AGI.

Oh, and dogs don't really have a clue as to what they do for us, so why do you expect me to be able to come up with what we will do for an advanced AGI? If we're willing to cooperate, there will be plenty for us to do of value that will fulfill our goals as well. We just have to avoid being too paranoid and short-sighted to see it.