I agree with Hissy, best to make your own, and then you don't have to be checking the ingredients list on store brands, checking to be sure there is no onion or garlic in the broth.
Much better quality control if you make it yourself
One other tip for getting more fluid into your kitty, take a favorite wet food, and thin it with water so it is a bit soupy.
Second unasked for tip <G> - freeze your homemade chicken broth in an ice cube tray, then you can just pop out one or two at a time to thaw and use, it's convenient and you can make up a lot of broth ahead of time.
Great tip about the ice cube tray Pat & Alix. I had used that method for my homeade baby foods when my kids were little, but I had never thought of it for broth. Thanks
Even the low sodium chicken broth has too much sodium in it. But my vet has told me in the past, to use it in an emergency. Like when the cat is dehydrated and won't drink water or eat canned food. Canned food is another way to increase their fluid intake.