Make sure whatever you decide to get says that it's AAFCO approved or meets their guidelines or something like that on the bag or can..... There's a few different companies making all meat unbalanced canned foods and it can get confusing. Those ones usually say something about being for supplemental feeding only on the can.
It could be possible that the chicken doesn't agree with her too. You may need to try to avoid foods with chicken in them (read labels, sometimes it's snuck in there further down in the ingredient list). Nature's Variety canned comes in various flavors (other than chicken). Merrick has a bunch of fun flavors too.... (Nature's Variety also has a free coupon offer if you sign up on their website. That way you could give it try without wasting any $$ if she won't eat it:
Welcome to Nature's Variety | Nature's Variety)
I mention these two brands because they're higher quality than anything you'll find in a lot of big chain stores, fairly popular and easy to find. There's tons of good ones out there though.
The Whole Dog Journal is a nice little magazine that usually has good info about foods. A popular website to "rate" foods is
Dog Food Analysis - Reviews of kibble I don't necessarily agree with all their ratings, but it's a good place to start if you're new.
Another option you could try if the canned food doesn't work out is a balanced raw diet. (That's what my kids eat). There's a few commercial brands out there that make it easy. Sometimes picky eaters will suddenly become ravenous when it's put in front of them. There's quite a few threads on here about raw, do a quick search if you're interested.
I would suggest browsing around the forum and doing a bit of research on what makes a good food. In the long run it'll lead to a happier, healthier Bella.