[Susan]

Hi Amy, are you show a Pit Bull mixed with a Chihuahua, I cant see that happening, LOL… A Chihuahua is so tiny & a Pit bull is a medium to large dog…Try her on 4health what your feeding Marley & see how she goes..
What was she eating at the shelter? you mite be better buying that & after she settles in then start slowly mix in her new food over 10 days….
Good-Luck with Minnie, I’d love to see a photo of them both..