We lost Star baby October 2. Our almost 2 year old boy, TJ, seemed to have adjusted to her loss. We have a little sister, Joy, arriving around Valentines Day. We happened upon Star’s leather collar buried in a drawer in December 30. TJ reacted immediately as soon as he smelled her collar. I know this doesn’t answer your question, but our basenjis feel the loss of their pack members. Only solution I have found is to bring in a new companion. It helps if they are close in age.