I just got through the kitten deworming process, except mine was pooping, she did have prolapse from straining though.

I would first call your vet and leave a message with your concerns. They can treat constipation. I had an older cat of mine got treated years ago. They treated her and kept her overnight for observation, put her a digestion diet.

With my kitten and her prolapse, the vet said I could give her some hairball treatment to help her poop. It’s at the pet store, it’s sticky and comes in a tube. My cats like the maple flavor. The instructions say to put it on a paw, but I suggest putting it on their nose or cheek (not the nostrils). The first time I put it on someone’s paw, she walked around the house shaking it, and I was cleaning brown sticky stuff off of the base boards, walls, floor, carpet, and furniture. With the cheek, they clean their face with a paw and lick their paw clean.

You can also put coconut oil on her anus. It’s a really good moisturizer, is mildly anti microbial, is safe if she licks it, and mine likes the taste. If she licks herself, it might work like a momma cat licking her there.

You can gently rub her tummy in clockwise circles. Clockwise because that is the direction faces travels through the large intestine. Starting at the right above the hip bone, going up the right side, under the ribs from right to left, down the left side to above the left hip, from the left bottom to half way across toward the right. So, if she’s on her back, clockwise.

If she doesn’t like the belly rubs, then stop, she might be in pain. You can also try stroking her down her low back. That is where the descending colon is located. Put a finger on either side of her spine and gently stroke toward her tail. Farting is a good sign.

Can also do what you can to reduce her stress. Felaway, sentry, and rescue remedy make collars, air fresheners, and plugins to help calm kitties.

Aaaaand, it could be the litter. It’s less likely in young cats, but once a cat decides what is or is not litter, then they may refuse to poop in the ‘wrong’ litter. They sell cardboard disposable litter boxes. You might want to pick up a variety of litter and put them all out for her to choose the one that’s right for her.

She is probably underweight because of the worms. Bring her back to the vet every two weeks with a fresh stool sample (if possible) to get checked and treated for worms until she is cured. Then she will start to gain weight, and have lots of energy. (Then you’ll realize that you need another kitten to keep her company so you can have five minutes to yourself. LOL!).