«Every dog I've necropsied (similar to doing a human autopsy), most after living out a normal life after suffering the disease many years ago, showed evidence
of permanent lung damage, sometimes significant,» Jones notes.
Hydrogen peroxide, which sadly is still recommended by some vets, can cause a whole bunch of damage to the esophagus, and if your cat happens to inhale it, either while fighting you as you force it down, or when they vomit it back up, can cause a severe pneumonia that can
cause permanent lung damage.
Olive oil, for example, can lead to
permanent lung damage and even death, because of the danger of inhaling the oil into the lungs when spitting up.