Tally likes Pedigree and she has had no health problems since I put her on it, so I am going to keep her on it.
Tally is 12 weeks old, right? So you have no idea how she will do on it. I think she's also a Westie - a breed notorious for skin problems. Eating garbage sure won't help that.
You may like Big Macs too, but a steady diet of them would do little for your health.