(Picking daisys have a counter on them as to how many you have picked.)
Lets have it so if you feed a caterpillar XX amount of honeysuckle without it mutating into a cocoon you gain the ability to right click it and transform it into a mount.
That or we can have it use 1 star/royal jelly after its been fed enough and if it hasn't eaten enough then it will just explode into bits and give the character insanity.