It's best to check the cause first, if it's just simple indigestion, you can give your cat some "mommy love", a version of the medicine that children eat to help digestion, which can improve indigestion and diarrhea.

People's drugstores sell it, half a bag at a time, twice a day, but this medicine should be sealed after opening the bag, otherwise the medicine will not work, and after opening the bag and leaving it for too long, it will be ineffective.

The soft legs may be calcium deficiency or too young, you can go on some cat forums, if it is calcium deficiency, strengthen the nutrition, eat cat food, and cat-specific calcium supplement products can be, the human calcium supplement products can be, but not necessarily will be absorbed very well.

I hope the answer can help you, there are other questions want to consult the pet doctor, click the avatar below, for free 1 to 1 consultation.