Should I Feed Them Grit?

[morninggloryhatchery]

Hi!
For a week or so now i have been getting alot of lettuce from my garden and cut some up and give it to my ducks,chickens,and Guineas. Right now since the weather has been so nice here the ducks live outside and so do some of my 5 and 6 week old chicks (there is 19 so they stay warm at night). And my Guineas live in their coop and i feed them outside. Same as the ducks and chicks. Do i need to feed them Grit? And if i do can i only feed it to the chickens and Guineas and not the ducks? Any tips and help are welcome. Thanks!

 

[Hollywood Chickens]

if they have any grain then they need grit,
If they don't need it then they won't eat it

 

[Judy]

I agree with Hollywood Chickens about chicks; I know nothing about ducks or guineas.

There are varying opinions on here, ranging from all chickens need grit if they eat anything but chicken feed, to, they don't need it if the soil has small rocks available.