Picky dog

So Lily has decided she doesn’t like the senior dog food we switched to after eating it for 2 weeks. I thought maybe she had eaten something she shouldn’t when she didn’t want to eat over the weekend. But then she kept circling Mia’s high chair for scraps. So I have her some turkey and she ate it up. I thought maybe her teeth were bothering her but she ate up the bowl of ice cubes I gave her today. Jeremy bought some of their old food today and she ate it no problem. Really? Our dog who eats her own poop is a picky eater?