food safety

Hello ! I'm here with a hypothetical question- I'm hoping my rats won't even have a problem with this but just in case- If someone can't get to the vet for their rats UTI What foods would you recommend other then Cranberries to help get rid of it ? Maybe Yogurt ? I'm just wondering for the worry...

Wheatberries (39%) (contains Gluten) (Water, Wheatberries), Red Rice (19%) (Water, Red Rice), Freekeh(contains Gluten) (19%) (Water, Freekeh), Black Barley(contains Gluten) (9%) (Water, Black Barley), White Quinoa (9%) (Water, White Quinoa), Olive Oil I’m looking at this microwaveable grain mix...

We just got new rats (although have had them in the past), 15 weeks old, and sneezing. Could be just the new environment but made an appointment with vet for Wednesday anyway. In the meantime, I make homemade Elderberry syrup for my family for cold and flu season as it's a good immune booster...