yeah as long as they all seem ok it doesn't really matter if u muddle them up i guess! In answer to the nail polish thing - no i just used standard nail polish, a tiny amount and it is helping me tell difference. I think it was maybe more important for me as i had to hand feed for first 18 hrs so it was important for me to know who i'd fed or not etc. Hopefully u don't have to worry so much!!
thank you everyone, i can relax now.
good luck with daisy , louise , hope everything goes well with her delivery and that she has safe healthy kittens.