I think we can assume the "growing zone" and crops would be similar to the situation in Victorian or Edwardian England. I did not mean to say that hobbits were vegetarians
. But knowing what I know about rural folk in earlier times, meat and fowl would not have been an everyday thing. I do think that chicken would have been the most frequent "meat", with pork in second place. They could have caught fish from shore in small lakes, ponds, and rivers, since they weren't keen on boats.