I used to watch my sisters’ cats play with mice until they were dead. After the mice died the cats lost interest and never ate them.
Birds were another matter. ;-)
The two grey strays that live in my house have an ongoing argument. One of them will catch a toy mouse or a toy chipmunk. They will take turns playing with it. It is their favorite toy. Now the fight starts when one of them breaks the toy and the other one gets angry. Of course they don’t realize that they just killed this little rodent. Usually, after the biggest outdoor fights, I will find a dead chipmunk nearby, who had for his last couple hours on this earth provided endless moments of feline entertainment.