We switched Georgia over the Wellness a few months or ago and she has been doing just fine. I was in the store today buying her food and asked if they had a loyalty program the guy said we don't but they do on their website as I see free bag coupons all the time.
I called their number from their website and they are sending me envelopes to mail back in the upc codes from the bags. Buy 12 get one free.
They should all be the same size as the redemption center will send you a coupon for the smallest bag you submit.
It never hurts to ask.