Remember how she would fly out the door and then go cruising the neighborhood at full speed, playing keepaway?
I fixed it. Darby happened to be out with me, at my feet when she went on another neighborhood run a couple weeks ago. Echo dashed off and looked at me "you gonna chase and fuss at me right??" Nope. I bent down, fussed and fussed at how sweet and lovely Darby was and gave her love and petting galore.
"Whaa?" said Echo. She came flying to me and took up her share of love and attention. She has not door dashed or run away from me since :) One recall and she comes flying to me for petting! What a way to use jealousy to my advantage LOL.