Thank you all for the responses. I used to do a huge amount of counted cross stitch and only ever used DMC, I owned every color they made at that time. (20-30 yrs ago) It never bleed until one project, it was ruined. I was shocked, but learned a valuable lesson. After posting my question on here I went to the DMC forums and searched. Found a few other people who had DMC bleed, (even though the company apparently insists they never heard of such a thing happening). Finally I have decided the best way to be safe is to cut a small piece of each DMC floss I am going to use for my next project, soak it in hot water, then put it on a white paper towel and let it dry. If it is going to bleed, it should show on the white paper towel. Tartan also recommended this method-thank you!
It's much better to be safe than to end up with a ruined project. I love this board for all the ideas and experiences of others.
Thanks,
Kat