I had a few moral conflicts at my old work.
We made equipment for eye surgery. A couple of times people from universities called and asked if they were suitable for rodents! I'd just say no they're designed for human use. However they are also used by vets so the could be used for rodents

Once someone called from a research company. I asked for more information and found out they were testing an eye cream on humans. She contacted the boss first so I couldnt just say no to her but I felt so awful about dealing with them until I found out they were testing on humans.
But once I got caught out. Someone borrowed a microscope to do demonstrations at a dr's conference. When they returned it they told me about the conference and said they did some live surery on goats!
I felt sick for weeks. I sent them that equipment to torture those goats!

99% of the time it was fine but when it wasnt I felt soooo awful. I couldnt just leave. I have bills to pay! I'm so glad I'm not there anymore.
The company I work for now does cleaning and I've had a couple of issues. One of the places they clean is a pig farm and a couple are catering places. But I dont really have to be involved in them at all. I just pay the cleaners.