Should i keep my weak n thin 1 month kitty wid his mumma..!!

Heya..!! I m having a 1 month old kitten "tiger" I got him near my garden. That day I saw him wid his mum. I don't knw y she left him N didn't come.I didn't go near the kitty ,I waited for muma cat to come. Next day it started raining heavily so I took him N as he was cold and weak I blow dried him N fed him egg yolk. I kept him wid me for almost 2 weeks. I fed him whiskas. But he was not gaining weight N was thin . I m having 2 more kitties of 7 months they wanted to play wid him but he was soo weak that he could not.. finally coming to the point..today I saw his mum with 2 kitties in my garden dat kitties were very active N healthy soo I decided to put my kittie "tiger "near them, soooo I did.. then I saw he was so weak that he was jst not able to reach his mum so I helped him.she smelled him, licked him N allowed him to drink milk for sm time it went good but later his siblings who are healthy enough ,came there N took the place.. Tiger was not able to make his place.Since yesterday tiger is sleeping continuesly.when I kept him wid his mum then also he was sleepy. I am worried. I m quite attached with tiger.I m just confused that should I keep him with them or not.. I jst want him to be healthy like his siblings.. plz help me..

Since mama kitty took him back then I think there is a chance that he will make it.  Here in the states we use something called KMR, kitten milk replacment.  If you don't have that where you live then get some goats milk.  You will need to supplement what he manages to get from mum cat.  Sounds like he is the runt of the litter and the others aren't allowing him to nurse.  Get a small bottle and nipple.  When you feed kitty you want her on her stomach in a position that is like the position he is in when he nurses.  He does still need to stay with the mom so he can get as much as possible from her as well.

Thanks a lot Denice. I used syringe for feeding him. Nor Kmr neither goats milk was available in my place so fed him whiskas kitten food which i had bought online n sm home made kitten recepies. Bdw i  hv let tiger to be with his mum. i will have a look on them. Again tysm..!!