sick kitties

My cat lester of 10 yrs has been sneezing and coughing and wheezing for the past 2 weeks it has gotter worse in the past 2 days. he still drinks and eats very little and his activity level is dropped to mostley sleeping..i noticed my other cat lizzy of 1 yr just started the same symptons but she is throwing up (dry heaves) my other cat tipper of 5 yrs has been fine so far..i have very low funds at this time and our vet is out-reagous...should i take them in or can you give me some advise? any help would be greatful...thank-you...cristi....ps..i bought a 20pound bag of cat pride at walmart 2 weeks ago..they have eaten that brand before..but i still worry if the food may be causing some problems???

A cat in this condition is very sick and must see the vet immediately. Cats don't weather lung problems well, & the cat could have a lung infection.
   
Also switch the cat back to the earlier kind of food.