You need to get these kittens on an appropriate diet NOW. You can buy
kitten formula at Petsmart and Petco and I think Walmart has it too. You
also need to help them eliminate as at this age they can't do it by
themselves. Here is an excellent guide that will show you how to do that
and help you help these kittens:
http://kittenrescue.org/handbook.htm

Megan

                                   

Have they been seen by a vet?  If one is not feasable (money wise), have you
been to a pet store and bought some KMR (kitten milk replacer).  As far as I
can tell, you are in the US, and KMR is sold at both pet and grocery stores
here.  I bought a different brand but basically the same from my vet when I
had an abandoned kitten to raise - and boy did he love that stuff.  Can't
remember the name of it now.  Or maybe there is someone locally who can
help.

Buy kitten formula! $25.00 should be all he needs until he's weaned.
The stuff is cheap.
It has to be kitten formula, which contains all the trace elements and
proteins.

Have to imagine the help you are in search of is just a phone call away.

Why not pick up the phone and call a veterinarian?

The *first* thing- warm the kittens up; kittens can't digest food very well
when they're cold.   Kittens less than three weeks old can't regulate their
body temperature or retain heat because they can't constrict the blood
vessels in their skin to hold in heat.  .

Put the kittens in a box and put a heating pad (set on low) on one side of
the bottom of the box covered with a few layers of towels.  Make sure
there's enough room in the box so the kittens can get away from the heating
pad if they become too warm.  The ambient temperature in the box should be
80-85F.  Stick a indoor thermometer in the box so you can monitor the
temperature.  I usually turn a box on its side so the top opening is facing
out instead of up.  This position holds the heat in better and I can curve
the heating pad up the back (bottom) of the box.

The kittens aren't growing because they're not getting enough protein.
Carnation milk doesn't contain enough energy, protein, and fat to sustain a
kitten at that age.  Also, the lactose level and the calcium-phosphorus
ratio are too high.

Get a few cans of KMR (Kitten Milk Replacement)-- Heat the KMR to about
97-100F.  Two-week old kittens should weigh about 6-7 ounces and need about
60 cc/day divided into 4 feedings.  Don't feed the kittens too much because
their stomachs are still small and kidneys and liver aren't fully
developed-- they'll develop diarrhea if you overfeed them.

Hold the kittens upright when feeding so they don't aspirate the formula
(inhale into the lungs) .  If the formula doesn't slowly flow out of the
nipple, make the hole a little bigger. *Don't squeeze the bottle*!!!--
Squeezing the bottle can force formula into the lungs and cause aspiration
pneumonia and death!   After feeding, gently rub their anogenital area with
a warm, damp cotton ball to stimulate elimination. The number of stools per
day is usually the same as the number of feedings a day.

If they're not gaining weight, increase the caloric density of the formula
and *not the volume*-- otherwise you'll overload their digestive system--
This is why I like to mix the powered KMR myself rather than buy the cans of
liquid-- I can easily increase or decrease the caloric density as necessary.
You can buy a feeding kit that contains everything you need- all you'll have
to buy is more KMR and some extra nipples.
http://www.maxshouse.com/Illustrations/Kitten_feeding_kit.jpg

In about a week, you can start teaching them to drink formula from a dish
and the week after that, you can start adding small amounts of canned kitten
food to the formula.

This is just a basic outline.  I think you should take the kittens to a vet
ASAP for an exam to make sure they don't need special treatment.

Best of luck and congratulations!

Phil