pixi, thanks for posting - misery loves company
I've been told by many experienced cat keepers that any dry food transition by itself, may trigger gas.
however I share your observation that Wellness (chicken&rice) triggers a lot more gas in my cats.
I also tried Evo (cat&kitten) and can report noticeably less gas, but I'm still in the transition stage,
so I won't know if I'm nearly gas free for another week - fingers crossed.
my cats were gas free on Nutro Complete Care (green bag) so if I find a great sale on it,
I may just stock up and put them back on that. posters here are critical of Nutro because
it has the average protein% in the low 30's (like Wellness), not 50% as Evo claims to be,
but if I can manage to find a cheap source of Evo, I'd rather pay more for better protein.
I also liked that Nutro pellets are twice as large, forcing my cats to crack them before
swallowing, which may give my cats a minor dental hygiene benefit while eating Nutro.
I feed my cats a measured portion using an auto feeder, and I noticed
they clean up the Evo far sooner than they used to on Nutro or Wellness.
bottom line; if you can afford Evo, and cat gas is reduced, you should stay with that food.
http://www.evopet.com/products/default. ... ga&id=1500
the best online shipping source for Evo I could find is;
http://www.nationalpetpharmacy.com/stor ... id=3011240
because shipping costs only go up moderately in my state when you order more than one bag.
try to find a supplier who ships near your state because it can save a lot on heavy shipping.
of course, some resellers are pigs and will screw you on shipper no matter where you are.