So.
Cat 1. Male aged 4. Healthy, eating well, drinking water, has good weight on him, behaving normally, but is fighting a bit more.
He has lost most of the fur on the underside of his back legs, and belly. No sores, no skin issues, it has not been pulled out in a fight. It is soft and looks a bit like he has had an operation, except it gradually gets thicker. He does not have fleas, has not been itching/biting/scratching, it does not appear to be bothering him.
Any ideas.
Cat 2. Sister of male, same age. She has started knocking things of the sides, pouncing on us in the night, meowing a lot, generally being very scittish (sp). She is driving us insane, we have had to look her out of the bedroom. she used to sleep on the end of the bed, no hassles.
She is also being picked on by the male cat. Behaviour is not normal for her.
Any ideas?