Help please with grit for goslings!

[Pgw]

I really need opinions on chick grit- granite- for my 2 week old goslings. Need to start introducing greens/grass but can't get any advice on a brand suitable for geese. I have been told get chick grit- well which brand? Some brands say give at 8 weeks, others don't say anything about giving to geese and others have additives like probiotics and veg. Oil? I just don't want to make them sick or cause issues. Thanks so much!!!!

 

[nuthatched]

Crushed granite is gushed granite, brand doesn't matter.
Some probiotics won't hurt bit just use some plain old grit.
However, if they have access to dirt, they may not need it.