Tiny kitten advice ( 13 weeks )

[Friedaubergine]

Hi everyone! Yesterday I took home my two 13 week old kittens. Baby was the runt of the litter and is only 550grams at 13 weeks old, from what I have read online this is TINY for a kitten her age. Her sister Honey is also very small at 750grams. They were both checked over by a vet before they were allowed to come home with us and they are completely healthy and playful kittens! Can anyone recommend good food brands that I can feed to Baby? As she is slightly on the skinny side. Currently she is eating half a sachet of IAMS Delights (in gravy with chicken) 3 times a day and she has access to Smilla Kitten Poultry Dry Food throughout the day. She loves her food! I just want them to have good nutritious food so they can be as healthy as possible :)

googled Katkin and Natures Menu and would like to try them on something like that.

How best to introduce without causing diarrhoea.

We introduced a half teaspoon each of something different day before yesterday and had to give them a bum wash at 4am.

Stuck to original and now poo is back to normal.

Would appreciate advice on transitioning please.

But kittens aren't people - they can have very sensitive stomachs and if you give them too many different types of food, they could end up with diarrhoea which can cause dehydration and be fatal in such tiny animals.

By all means add a new food but it should be done incredibly slowly and carefully, especially with such underweight kitties.

I wouldn't be chopping and changing foods yet.

Let them get to a bigger size so they're a bit more able to tolerate a change in diet before trying to move them onto a different food.

I think if they had such a strong reaction to half a teaspoon of new food I would leave it a couple of weeks before you try again. Kittens guts are quite sensitive.

What was the new food you tried?

@AnotherEmma It was Lilly’s Kitchen pate

Hmmm. My cats have that and like it, but as everyone else has said, the change must be too much for the kittens' little tummies
When I got my two as kittens, they had been given Orijen dry food and Nature's Menu wet food, so we continued with the same. They still eat Orijen (we never changed it) but at one point they stopped eating Nature's Menu, inexplicably, so we give Lily's Kitchen instead (one specific flavour they like)

i googled Katkin and it looks good - probably expensive but could be worth it as they are underweight?

Hope you can find something suitable and time it right so the gradual switch doesn't upset their tummies.

They are lovely - many kittens have big ears, they just need to grow into them.

Can't recommend a food - just wondering if some lightly cooked chicken as an extra might be an option as it'll be full of protein. If all the food is going, then it might be worth giving slightly larger portions or an extra meal for now.

Some cats are just naturally slimmer. My two are brothers. Boris is chunky (not fat though) and Ollie hasn't got an ounce of weight on him. Ollie is fed on demand (so has as much as he wants), but he's very active though- always following us, looking for trouble.