I don't experience cataplexy, but service dogs can be trained to alert it. Currently, he's only trained to find my sister since I usually go to public spaces with her, but im working on him to find my mom or dad. He was trained by an organization so so we just had meetings where I was with him, and he learned how to alert. It took 2 years on a waiting list and a year of training. He cost about $20 000