Kittens won't drink formula, have gas, indigestion, and no poop. What formula helps?
If you haven't already, I would schedule a vet visit to make sure there isn't a health issue causing the digestive issues, rather than the formula. Parasites (very common in kittens), blockages, GI upset, etc could all be causing the problems and can often present as fussy kittens with little bloated bellies. If they're not passing any stool or urine, that is also a concern. I wouldn't offer a probiotic as they are both very young, and it may just mask a different problem that could need treatment.
KMR and other kitten milk replaces are the best option as they are formulated to provide the right nutritional balance for the kittens. You will likely need to be feeding smaller amounts more often to ensure they get enough and to keep them from getting too full and uncomfortable. Feeding them while they are on their bellies (like they would be while nursing) can also help ease digestion.
https://www.petcoach.co/article/how-to-raise-orphan-kittens/
Updated on September 23rd, 2025