I personally wouldn't feed Natures Fresh- it contains Carrageenan. Please read link below. It also has Peas and flax seed. Which I have noticed some pets get itchy while eating. Take Peanut for example. He cannot have flax seed, peas, grain.. and the list goes on. I would find a grain free food. Try to stay away flax seed if you can.
In the mean time if she is really going at her feet you can take her into the Vet. He can give you some medicine that will help her. If she continues to lick and bite she will get hot spots and start losing hair.
Carrageenan Just Don’t Do It | Dogs Naturally Magazine