How to change core mod items in my mod?

[johnakers]

Let's just say I want the cacti to generate both a little wood and food.

I don't want to touch the core mod.

I have 2 separate definitions for the cacti (core then the one I made).  I load up both, the core mod and food cacti.

Is there a way for me to set the food cacti definition to always be used?
Can I set up the mod so it redefines the already defined cacti?

[mrofa]

If you make a mod with a object that have the same thingdef name as object in core mod, you mods thinkg def will replace the core mod thingkdef in game.

[johnakers]

If you make a mod with a object that have the same thingdef name as object in core mod, you mods thinkg def will replace the core mod thingkdef in game.

Sounds simple enough then.  Thanks!