3 month Kitten keeps puking and passing stool. Help!?

Hi All,

Need help regarding my kitten.

History -

- Separated from mother at about 2 days after birth. Has been reared by hand since then. Fed a diet of milk formula initially for 6 weeks, and then cerelac ( infant cereal ), rice formula. Had started her on a diet of boiled mashed fish with rice about a week back ( one meal per day, accompanied with the cerelac and milk formula in other meals of the day ).

- She has been given deworming once from the vet at about 6 weeks.

Gave her cat food "whiskas" or something ( made in S.Africa ). Processed meat cutlets in gravy. Mashed them up so she could eat em properly.

After about 12-16 hours, and after taking one meal of cerelac and also milk formula, she started pooping a lot, and passing a lot of urine. All normal in color.

Now she has puked roughly 5-6 times, and at all times whitish froth is coming out. The last she puked i saw a few chunks of the cat food ( very very small ).

Her last stool was quite watery and loose, Other all were normal.

She is looking really de-hydrated, and extremely exhausted with the puking. I tried bottle feeding her some milk formula, but she would not take it, so i dint want to exhaust her more, and have left her to rest.

Please advise, is it just a reaction to the cat food? ( because the cat food was given before also, when she was about 8 weeks, but only twice and in much much lesser amount ).

Should i not feed her anything for the next 6-10 hours and let her system clear itself up, or try and give her something??

- This is the first time handling a kitten, and that too from day 2-3 of birth of the kitten. Have experience with dogs from 2 weeks old, but not with a kitten.