Houseplants are often good places for moulds to grow. If you can't get rid of the plants, putting charcoal, the kind you get for aquarium filters-on the soil will help inhibit mould growth. Pillows and mattresses get mouldy, too. Change the bed often and switch to fibre-filled pillows instead of feathers or down ones. Allergies to mould spores are particularly bad in the autumn, when leaves cover the ground and are gathered in clumps outside windows.
Moulds grow in damp leaves and cause problems until a long-term cold spell occurs.
Try to keep the area immediately outside your house free of dead leaves and clean dead leaves from around the windows. Winter, too You may not realise it, but winter is a key time for house dust allergies. You keep the heat on and the windows shut. There's not much you can do for such a cat-other than stay away from him or her. This involves taking a tiny bit of the allergen that's causing him the trouble and injecting it into his skin.