That's not what your source says tho, eggs are vegetarian

The key part is:

> But it is not isolated in our kitchens. We have chicken all day, every day, and that's not going away, so we want to be very candid and open and honest with our customers."

I think this is key too:

> "This is made with cauliflower, pickles, bread, milk and eggs. If that works for your definition of vegetarian, awesome," Neslage said.

I know vegetarians that won’t eat eggs.

I know vegetarians who eat fish and/or chicken so...

The conventional definition concerns animal meat and by-products of animal slaughter, but many people do whatever they want

There are many subtypes of vegetarianism but only a few skip eggs: https://en.wikipedia.org/wiki/Template:Comparison_of_vegetar...