No more Avoderm

Hi guys,

Lillian Booth has been eating Avoderm but they just went out of business. We have about 1 week left of food for her and the shops are out. I'll call the vet on Monday to ask him what she should eat but I also wanted to ask you guys.
She's allergic corn and grains make her gassy. She's 10 so she probably needs an older dog formula. She likes all the flavors. Opinions?