I am so sorry to hear that! Have you ever thought of feeding the critters in an area away from your Semps? Then you can feed the baby deer and when their bellies are full, they won't want to eat any of your Semps!? Does this even work? I just thought it sounded like something I would have tried.. :/ I hope that helps or sparks some ideas in your head!
[...very passionate about Biology and Art. One day I would like to breed award winning hybrids.]