how much and how often should i feed my runt kitten?

hi everyone, on saturday i got this sweet little kitten, she’s a ragdoll and around 13 weeks old now, she was the runt of the litter and just tiny. i’ve never owned any cats or kittens before so this is entirely new to me. she got weighed when we got her and was around 0.7kg but she went to the vet for a checkup today and was 0.69. it’s possible there was inaccuracies in one of them, and my mum is going to get a proper digital scale for me to check at home so i can check her progress. vet says she’s fine, just very small. she doesn’t look 13 weeks at all. when wr got her, we asked about her diet and she was on dry food left out all day, and one pouch of wet food split into two meals. i followed this until wednesday, when i started to worry and realise she needed more nutrients so i went to three meals (half a pouch each time) and then four on thursday. research i saw said to feed them every six hours, so i’ve been getting up at 6am to feed her breakfast and her last meal is at midnight but obviously this is really inconvenient and it probably doesn’t really matter anyway either how long between meals? most people say you can’t over feed a kitten. so i’ve considered changing it to 7am, 1pm, 6pm and 11pm and trying to get her to have some dry kibble at a couple points. i’m just a little worried about how small she is, her bones feel very noticeable and i want to be feeding her right but it’s really confusing me because i don’t know what’s right. i asked the vet and she said it was a little hard for her to say since she couldn’t see the guidelines of the food she’s on, but to try to follow them to an extent but use common sense as well. i’m worried about her not gaining weight!! most of the time she doesn’t eat all her wet food at once and ends up coming back to it a bit later, so am i giving her too much at once??? but if i feed her smaller portions won’t she be getting less food and so won’t gain weight? just if anyone could give advice it’d be appreciated, i don’t want to mess up and i just want her to be healthy and happy

Hello!  Well done for taking your kitten to the vets to get her checked.  Thats important because, for example, a heart murmur might have explained it.  I don't think that you can completely rule out eg heart problems from the outside, so that's worth keeping in mind, but it sounds as though your vet has found nothing to concern them.  Did they think that your kittens' size was appropriate?     If everything's going well, small meals and often is a good way to feed a kitten.  Just like people, kittens don't like to be overfaced.   Its good to clarify whether your vet thinks she's underweight before worrying because its easy to assume that kittens should eat more than they do - their stomach really is tiny and feline obesity is huge in the UK.   Use food in type and quantities as reccommended by your vet and weigh the kitten to check that they are growing.   Remember that our plates are quite big, but kittens are tiny compared to you.  Its good to feed an appropriate amount of good quality food because it can save problems later. Wishing your kitten a smooth journey to adulthood.

Ps It is absolutely possible to overfeed a kitten and perfectly normal to feel their bones to some extent.  If you cant feel a cats bones they are probably obese.  If the are eating, poohing and playing well then most kittens will self regulate.  This is ok.  I have known owners offer something tasty when their kittens stop eating, but this is the eqivalent of handing children sweets once they say that theyre full and should be discouraged.   Many vets have some kind of scheme by which nurses will perform regular weight checks for monioring and reassurance.