Occasionally, foreign bodies can gain entrance into the nasal passageways of cats via the mouth, causing extreme irritation and rhinitis or sinusitis. The chief culprits in this category seem to be blades of grass, which is not unusual since many dogs and cats love to chew on vegetation.
Pets with nasal foreign bodies will sneeze and usually have a cloudy or bloody discharge coming from one or both nostrils.
Veterinary inspection of the back of the mouth and inner entrances into the nasal passages while the pet is sedated or anesthetized is often enough to identify and extract the culprit.
If not, surgery might be required to remove it and to prevent secondary complications associated with bacterial infections.