They look at least 8 weeks old if not older. But they have a curious trusting look too which is great. I just caught a mama cat and her 3 12-14 week old kittens tonight by using a large trap and holding the door open with a long piece of rope. They had a light breakfast, so were very hungry by 8 this evening. I had a sneaking suspicion when you posted her picture before that she may have had kittens. They're coming out of the woodwork now arghh!