Hi I was wondering how often finches moult. My Stars and Red Faced parrot finches look a bit dull, the stars look like they are losing feathers on their heads.Also I have 3 pairs of zebras in a small aviary 2 pairs I have had for 6 years,I got a zebra finch from the RSPCA (was left at a house that the people were evicted)I gave her a mate she had 3 babies her mate died for no reason she is very aggressive. She was good with her babies, I have now got her a new mate but she chases him and is aggressive to him. Should I put her in a cage by herself as she stressing the others out? Will a finch be okay by itself in a cage without the company of other finches?