Easier still - make your own broth. It's real simple - just buy some soup bones or marrow bones, boil them up for a half an hour or so, chuck the cooked bones away, let broth cool and serve..............voila, easy...
As for adding chicken livers, yes, they will add more protein, I doubt it would have her bouncing off the walls with extra energy nor do I think it will bulk her out much either.......
I would only add a little liver though for the simple reason that liver is very rich in Vitamin A, kibble is usually quite sufficient in this vitamin already, too much Vitamin A gets stored in the body and can be toxic - it is not like Vit C that gets passed out as water..... Given raw, liver can cause very bad diarrhorea - when I first introduced it to my dogs, I gave it 5g increments......not sure whether cooked liver would have the same effect.
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