[SweetKT]

I just recently got two kittens (brother and sister) from the local shelter near me. They are approximately 3-4 months old. They were checked out by the vet and I have the paperwork. They seem to be doing great except one of them (and I can't figure out which one) has partial runny, partial hard poop. This cat has pooped in the house about 4 - 5 times. I thoroughly clean it every time. I have two litter boxes and they both pee in the litter boxes.
I have been feeding them Purina kitten food and a friend told me it might be too rich. I have switched to wet cat food, but only for about a day. They both act like very typical kittens. I'm thinking it might be stress of the move and adjusting to their new home, but I'm not sure. I need some suggestions because I don't want my babies to feel icky! Thanks in advance!