hummm 9 inch Jag and 11 inch RD. Well that RD is about to start tapering off in size and the Jag is still well on his way to doubling his. Hummm, thats not to far apart in size, obviously the RD will have the weight advantage right now. Within a few months they would probably even up in size, maybe at about 13 inches a piece im guessing. Wow, hard to say, they are both pretty large already and with the RD being adult, it may be less apt to share. Well anyway, like I said, good luck, hopefully it works out for you.
