I have two 9 month old girl kittens that are weeing in my flat?

I gave this reply to another similar question: My cat used to pee in the tub and sink when he had a bladder infection. The vet said that cats know when something is wrong and they consider the urine "unclean" and will not go in their usual place. It's worth looking into. Ask your vet to check them out.

Also, maybe mom cat didn't show them the right way?

If they are nine months old and meowing strangely then they could be coming into season. My cat did this. Would you not consider having them spayed? It would be much kinder to them, and to you. I had both my cats spayed after one litter of kittens and things calmed down considerably. I would certainly do this before re-homing them as that would be very hard on them.

I would also confine them to one or two rooms whilst you are at work with maybe a litter tray in each room. As long as they have toys and a place to sleep they should be fine. It is a very stressful situation for you but I think easily remedied. I really hope this helps

This may be a sign of an infection, I would advise you to check with the vets to make sure.

If it isn't Make sure the litter tray is always clean, and everytime you see your kitten start to go (when he starts to sit, not when he is actually peeing) to the toilet, pick her up and take her to the litter tray. It's also important that after, you praise her with a treat and a few strokes.

She might be in pain so I think you should take her to the vets, so she is safe and you can train her ealier to stop it before it becomes a habit. Hope this helps :)

I would firstly get them checked by a vet to ensure they don't have an infection and secondly ensure you have a litter tray per cat, that they are in a quiet secure area and that they like the litter being used.

Make sure that they have a clean kitty litter box 2 kitty litter boxes are better as they will use one to pee in and the other to poo in.