u/chocomilkgoddess

i started fostering a 1.5 month old blind kitten 2 days ago. she knows where the litterbox is, however she keeps peeing and pooping right in front of it rather than getting inside. i'm suspecting that she can't reach the litterbox by herself since she's small so i'm planning to get a seperate litterbox with lower walls, however my other (adult) cat is a weirdo and likes to dig very frantically so she creates a mess around. i also think that she simply might not know how to get inside the box, but i don't know how i can teach her to get in the box. anyone have any suggestions?

ps: she's fresh out of the vet and her pee is clean, so i'm ruling out uti.