Armani is much better trained then Chloe. When she was very young she was sick and I honestly was way more concerned about her health then training her. Now, no matter how hard I try the ONLY thing she knows is sit- LOL! But she is so sweet- so ehhh- we practice that sit ALL the time and it has gotten very good
So I don't know if it was the lack of training as a pup or simply that she isn't as quick as Armani. They are full brother and sister, so it is not genetics.