I know mine has. My cat is nearly 8, she never brings in any "presents" however, the last month or 2, she has decided I would be very appreciative of dead rodents & birds!! Lovely. The only other time she did this was when I first had my little boy 2 years ago, then when he was a few months old, she brought live ones in - I was told this is because she thought he was old enough to learn to hunt himself. Has your pet been acting differently??