Should my chicks be this color?

[nuthatched]

So does this mean that all my white chicks are roo’s?

I don't think so, both genders will be white in the sexlink x australorp

 

[NatJ]

So does this mean that all my white chicks are roo’s?

No, the white does not tell anything about gender.

There are three genes that can cause white in chickens, and only the one called Silver can be used to create sexlinks. Your chicks are showing Dominant White instead.