Fishmonger or butcher in Mission Bay/SOMA?
I don't recommend buying meat from the WF on Harrison and 4th. I've had multiple problems with freshness, especially on sale items from the butcher case. Stick to seafood there, or get meat at the Potrero branch. You might have better luck with the new Safeway by CalTrain.
If you're further south, the Good Life Grocery on 20th in Potrero Hill carries Atkins lamb, Fulton Valley Farms chickens, etc.
Or there's Trader Joe's.
Good Life Grocery
1524 20th St, San Francisco, CA
@ the Ferry Building: Golden Gate Meat Co, Prather Ranch Meat Company, San Francisco Fish Company
@ Mission Bay: Whole Foods on Rhode Island (they're a little pricey, but the seafood dept always looks good)
@ Bernal Heights: Avedano's
235 Cortland Ave, San Francisco, CA 94110
Golden Gate Meat
Ferry Slip, San Francisco, CA 94111
1 Ferry Bldg # 32, San Francisco, CA
San Francisco Fish Company
1 Ferry Building # 31, San Francisco, CA 94111-4230