My 3 month old Chihuahua puppies breathe smells like tuna…what can I do to get rid of the smell?

*INFO:
I just got her a week ago and her breathe smelt then, I have only been feeding her Pedigree *Small Breed dog food...Is there something I can buy that will get rid of the tuna breathe, or some other type of food to feed her.....PLEASE HELP, THANK YOU SO MUCH!

What is the best food to feed my toy Chihuahua?

I just received a toy Chihuahua (2yrs old) as a gift and we purchased Iams toy/small breed dog food, and she has barely touched it. What should I do?

Where can i find free or low cost chihuahua puppies in tampa florida?

I really, really, really want a chihuahua really bad, but I can not afford all these thousand something dollar puppies, even the ones that are a couple hundred. unless I could make payments on one. Does anyone know where i can find that? any small breed will do that I can spoil.