The new empty hearts are supposed to reflect the status of a cat who has been given vitamins in the past 48 hours. However, I have a handful running around that have empty hearts, and I didn't give vitamins. I finally realized this must be caused by the LOVE DROPS!
Is this a potential bug? Wouldn't the heart go from empty to full after the cat breeds, since technically the love drop is done and gone once the cat has bred, as it is only good for that last 1%? Or does the love drop prevent a cat from receiving a 5% or 10% dose of love again for 48 hours, like all other vitamins?