Thanks for the help...
Am I right to think they will start litter training about 4wks?
They will probably be quite contained - somehow - I'm planning on starting with a playpen until they're able to get out and then it'll have to be the kitchen/utility area - have not completely planned will have to play by ear.
Hopefully then by the time they can get into hooded one they will be old enough not to eat litter and I can just get a couple different sized for kittens to grow through.
I will have to get some of these litters and try some in one of the trays to see if Zelda uses them - then I can use that on the kittens too.

Thanks again
Emily