Hope you find out soon what the spot on her lip is. And I know where you're coming from on the 45 minute trip to Petsmart. Before we moved to Vegas we had the same thing. Luckily, by switching her to a better quality food she'll eat less of it. Soph gets about a third of a cup of kibble a day so an eight pound bag of food will last her four to six weeks. Plus, on better food you get less poo since they're able to digest more of the kibble and it doesn't just go in one end and out the other
and what you do get isn't as stinky.