[mimimomo]

Do you think your vet can get other foods besides RC?

Keep in mind that Evo 'red meat' has 40 something % protein & is not recommended amount for Yorkies. High protein levels are not good for them, keeping it at 20 something % is the norm. (sorry I'm not accurate on the #'s) I think they have other formulas & is a good quality food.
I know all dog food has an expiration date, it's usually up to 3-5 years. If stored in an airtight container away from the sun, it'll last longer.

1. I personally would not downgrade food.
2. If your Yorkies are doing well on SG, I would keep them on it.
3. Yes, I would try to find the closest online place that wil ship to me or have family members ship the food.