There are several things that have changed in regards to taming. First off, you will be able to gain skill off of a previously tamed creature unless it was transferred to you. This is a blessing for the midlevel tamers, as now they are no longer hurt by assholes that like to leave behind their tames. Also, the release/retame bug is no longer viable to give nontamers high level pets (such as nightmares)
Secondly, failed commands will drop a pets loyalty much faster now. A side effect of this seems to be that overall, it is much more difficult to control a dragon in the first place if your taming is low. I have heard reports that failed commands will drop a pets loyalty as much as one whole level. So what does that mean? If you have a 20% failure rate when its extremely happy and fail, it goes to very happy, where you might have a 30% failure rate. 40% failure rate for happy and so on. I don't claim that those numbers are accurate, as they are just an example.
Another report is that there is finally artwork for the Veterinarian title. Firedog had promised that we would have it soon, and he did make good on his promise. Now will I drop .1 taming and lore just to show it? *ponders a moment* Nah, I don't think so :-).
A side effect of part of the publish: no longer being able to eject pets of a co-owner/friend from a house. There is still a way around this, as I needed to eject my pets from the tower I co-own to achieve gm veterinary. How to get around it? Do not make both pets guard you. Tell your injured dragon to attack your attack dragon. Attack dragon never flags as being controlled, therefore, it is ejectable from the house.
Help on horses and retaming. Any horse that is retamed is no longer controllable once it is retamed. Do NOT try to control it until you feed it. Retamed horses will no longer transfer. Wild horses (never been tamed) are still commandable upon taming and are still transferable. If you buy a horse, please take care of it if you cannot tame them. Remember, horses purchased from the stables do NOT count as ever being tamed. Once they go wild, they still act as though they were wild and can be treated as such.