grr, barfing again

Both cats are barfing again. I am feeding something that I know is not great. But it is obviously not agreeing with them. So I am going to run by what I know here. I need something I can afford.

#1, avoid corn and soy?
#2, protien as first ingredient, perfereably first few ingreidients?
#3, single protien food?

Do you think an adult food might help?

what has been tried ???
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How old are they now ???

Will the eat wet food ???

Are they taking anything for hairballs?

Is hairball stuff safe for cats under 1 year? I have tired nothing for hairballs because of their ages.

They will eat wet food, I cut it out of their diet because of the costs. They get it about once a week now (totally unrelated to the throwing up).

I have tried Nutro Natural Choice Indoor Kitten and Regular Kitten. Nutro Max Cat Kitten, Whiskas Kitten (did not throw up on, but I do not like the ingredients), Purina One Kitten, and now Purina Kitten Chow.
They seemed to do okay on the purina one as well. But I want something better for them.

Edited to add, Raven will be 1 in August and Jack will be 1 in October, so 10 months and 8 months old.

Also edited to add, we have a petsmart, walmart, and a diamond horse (and pet food) store. We also have other pet stores but I have never been in them and do not want to go there just to buy catfood.

yes adult food is feasible ...

do you have access to Costco ??

I don't think we have a costco.

I looked at the stuff Coco takes but it dosent say if its good for Kittens. Its called Lax aire.

well when pepe went into the clinic because he was sick he was given antibiotics plus some hairball remover and he's 7 months old so..lol

I don't know what the pricing is, but you could try Sensible Choice Kitten food. Petco usually carries it. I fed the adult formula for a while, one of my cats had issues so we went to the chicken/rice formulation.

Right now I'm actually having better luck with Iams Healthy Naturals for my guys. I have issues with what they are willing to eat as well as what they digest well, so that limits our food choices.