Thanks everyone for your advice. I agree with most all of you and think we will wait a while. Rocky is entering that stage were he needs intensive obedience training and he is definately testing his boundaries to see what he can sneak away with. After some reflection I am not sure I can handle 2 and one of the posters had a good point about the "monkey see monkey do" concept and if I am working on things with Rocky, I would rather wait and have him be a role model for a new pup, than to teach two.
To answer some of the other questions that have been asked, by siblings I mean Rocky's parents had another litter so those puppies, while not his litter mates would be his siblings (half-siblings). I agree that its not ideal that mom has been bred 2x and has had litters 6-7 months apart, but that's out of my control. However, its because of them that I have my little pupper, and I wouldn't trade him for all the mega-million lotteries in the world.
As far as solid and parti pups, I don't know and can't answer it because I don't understand parti or the different colors (difference in buff vs red vs parti vs roan). People as me what color he is and I tell them buffy-tan with polka dot fee and white tummy. As for whether or not he looks like either an english or american cocker, or a mix of the two....I can't say either. All I know is that his white tummy, and white with polka dot feet and mostly floppy ears make him cute to me and my family. For a while, I was concerned that abotu which type of cocker he was, but now I really don't care. Field type, working type, show type..... all I know is he is a family type. When he runs and jumps and such, its cute to watch his big cocker-ears flap. It's possible that one ear may be a smidgen longer than the other, but at least he has 2 ears and they are soft and silky to play with. Its one of the things that make him unique. I once had a 3-legged cat and it was what made her unique too.
Rocky's dad is an AKC registered English Cocker and his mom looks English to me with a puppy cut. She doesn't have a skirt and her ears are groomed short to the leather. If he's not absolutely 100% purebred, it makes no difference to us, because to us, he's 100% loveable. We get stopped all the time when we are on our walks and everyone says he is cute. So far, his health issues have subsided and the only thing he needs is his probiotic every day else we get the loose poos and he gets the bubble guts.
I've signed him up for obedience classes and will continue to do one-on-one sessions at home with him and will have a trainer come to me sometimes to work on a few other things. He's getting to be a smart little puppy. He has figred out how to open trash cans with pop up lids, reaches for his toys/balls with his paws (like hands) and can suck a piece of food off the counter in stealth mode better than a hoover vacumn without ever touching the counter with his mouth or face or tounge (note: this was not something we trained him to do, we caught him in the act one day). He's settled in very nicely here. We've had one potty accident in the past month and that is because he was playing with my son and I lost track of time. He's way to young for me to claim he's housebroken, but he is certainly well on his way to getting the concept down.