Sure will. We lost eight ferrets four years back due to heart worm, our vets don't really know much about war weasels, and so sometimes it's hard to actually get to the bottom of things. With the heart worm (which we traced back to slugs coming from the farm behind us), the ferrets started to cough, became lethargic, their paws started to swell. All due to their lungs trying to compensate for the damaged to their hearts. Sad times. Strange thing was one ferret wasn't effected at all but she had adrenal disease.
We only have a jill and a hob now, got the jill to keep the hob company. Annoying