Yay for Poo! we celebrate that here! LOL …. 4 weeks is plenty old enough to start litter training ….. make sure the first tray has low sides, so she can easily get in/out …. those disposable tin foil pans are good to start with ….. don’t make it too deep to start …. if you didn’t already flush the poo, next time she poos, put it in the litter tray and then put her there …. leave it in there, so she can find it next time she feels the ‘urge’, she should to back to where she smells the old one ….. and don’t try and bury it – cats will naturally scratch/cover their ‘business’ …or she may be a rare ‘top pooper’ …. squats, drops and runs …. every one is different!
… weaning from bottle to solid food should take place slowly …. can she lap the kitten milk from a bowl? I’d guess probably ….. so start by letting her get used to lapping from a bowl and giving her a teaspoon of wet food a couple of times a day ….. then, slowly decrease the milk bowls and increase the wet food …. for a little kitten a table spoon of wet food 3-4 times a day should be enough …. believe me, if it’s not, she’ll let you know! LOL …..
…. best of luck and keep us apprised of her progress! What a darling Snowball is!