She's using imprecise language to describe what's going on. Pardon her.
The fact is animals (and humans) need a certain amount of minerals that distilled water wont provide. And if they don't get the minerals, then they excrete the minerals and end up deficient. That's what she's saying.
If this weren't true, curezone wouldn't be necessary because nobody would have ended up running their systems down by not replacing the vitamins/minerals necessary to keep your body running.