Hello Tinkerbelle, Sorry it did not work out with Drake and Buddy, I think that some of the reaction you are getting is because in your other post "Help Me Convince My Husband" you were so heartfelt and urgent about getting Drake, so people emphatize with you and were surprise that you rehomed him after one day.
The aggression definitely is a game changer. It sounds like timing was the main contributing factor....1) you brought together two brand new puppies, one was in your home for a week, the other for a day both were already under stress adjusting to a major change in their enviroment. 2) Drake is 7 months (how old is Buddy?) hormones start coming in around 6 months so they are already going to be prone to aggression.
I think that in time or at another time you would have had a better result with the two dogs. You're wise to let Buddy adjust.
Did Drake come from a good environment...a caring breeder? Why was she giving him away for free...maybe he has a history of agression??? If your sister keeps him, in time he and Buddy may get along.
Another thing to consider Yorkies are VERY territorial, so when they initially meet a future sibling it should be in a neutral area like a park. Start them out by going on a walk together before bringing them home. The walk releases pent up energy, relaxes them and help them share and bond in a pleasant experience. Good luck.
