I have two coturnix quails in a cage indoors at the moment and just today I have noticed a lot of fighting where one of the birds is peckings and chasing the other. They should both be females but we are having doubts since we might think the darker one of the two has a browner chest. The other is lighter and has a swollen eye from the fighting which she is not opening. Advice please??! I have them in their cage seperated by some cardboard to prevent further injuries.