I've had great luck with a product called Zero Odor - it's a spray that somehow links to odors to eliminate them. It won't remove the color from, let's say, a poo stain, but will apparently eliminate any residual odor (also works great on other, more human-related odors!). You can get it at Bed Bath & Beyond, and also on the internet - and BB&B is really good at returns should you not have the same good luck. It's a little pricey - about $12 for a bottle - but you don't use much at a time.
Please keep us posted - and we're all praying for a happy resolution for your family.
Please keep us posted - and we're all praying for a happy resolution for your family.