Sexing Broilers and ISA Browns 4 weeks old

[CityChickenJon]

Can I do it now or should I wait. One of the Browns look to have a spur on both legs just above the ankle and to the inside. None of the other have this, am I crazy or is that a male. This is my first attempt at chickens. So please be kind, Jon

 

[Bantimna]

Jon,
Please post pics of your birds. It will help alot.
If your Broilers are for meat, it won't be nessasary to know what their sex is.
Both sexs do well for meat production.
If you got your ISA Browns as chicks then the females should be golden brownish colour and the males a whitish color with a light brown tint.
Here is an exellent link:
Sex-linked Information