How many hens can you feed with one vegetarian?

On the carton of a well-known brand of "healthy" eggs is this curious statement:

Am I the only one that finds the phrase confusing? As written, the marketing tag could mean one of two things:

1. The hens are only fed by vegetarians. I assume when someone applies to work at one of their farms, this company has a line on the application which asks, "Do you eat meat?" If you are likely to do so, you will be forbidden from feeding the chickens.

2. The hens are fed actual vegetarians. Well, that is what it says. Presumably the vegetarians are prepared in some sort of way that is palatable. I'm sure PETA would find some sort of schadenfreude in that, although they would no doubt prefer that the hens be fed carnivores.

If the latter is true, it brings up an interesting question: How many hens can you feed with one vegetarian?

—Wayne S.