To be technical, bee pollen is not a vegan option, but is a vegetarian option. Vegetarians (myself included) tend to eat animal products if it is honey, eggs, milk, etc. I personally only get butter, milk, cheese, eggs, etc, from farms that pasture raise their animals and don't use the growth hormones and chemical additives. Vegetarians don't eat the flesh of animals. Vegans won't eat or use any product that has anything to do with harvesting any animal products.
On that note, I feed my dogs and cats and fish animal meat. Though it's generally fish based instead of chicken [mass produced, lower quality meat] or pork/beef [red meat just isn't a healthy daily option], they are still either obligate carnivores or omnivores with a need for meat based protein, and I will provide that for them.
And not to disrespect any life form, but, it's flies and crickets we're talking about. Raised and harvested for this specific purpose. Generally fed live, or pre-killed in a relatively quick and painless way. Live a little c;
I know my reply is late but it's the principle. Working at a pet store this was a constant battle with many customers. "Can't I just feed my cat lots of vegetables? Or like, tofu?" No, you may not, and if that is not okay with you, get a hamster.