I have heard all sorts, that you can back at 2 then turn away until 3 (which I won't be doing) that you can back at 3 or some say not til they're 4. I was just wondernig what everybody thought here?
Also, I have been told that coloureds take longer to develop and so need backing later? I'd never heard this before has anyone else heard this and is it right? Or just an old wives tale?