Pretty simple suggestion, if you lioness is giving birth at roll over a notification should be sent to your inbox...I just had a 2% girl that took 80+ tries give birth to cubs who died because of no nest. Because I thought she had one.(actually I know she had on cause I built it as soon as I bred her, it was made of albino feathers) the notification on the lioness' page isn't good enough if you don't visit her page!

Edit: two things I'd like to point out: one the lioness in question DID NOT have the nestless icon to indicate that she had no nest

two:larger prides with all the cool down and heat icons + mood or leaving or hungry makes it hard to notice ONE particular icon...I find it worse with footnote icons added to the mix