Lead poison is a hazard that is normally associated with humans, especially children but cats and dogs can also be susceptible.  The same sources that affect people like old paint or plaster with lead in it can hurt pets as well.  Dogs or cats usually get lead poisoning during home renovations especially in older houses.  If a cat gets a lot of dust on him when paint is being removed, he will groom himself and ingest the lead particles.  Dogs may chew on construction materials. A pet with lead poisoning may have vomiting, diarrhea, depression, dementia or seizures.  If you suspect lead poisoning, your vet will prescribe a blood test and administer pet medication if necessary.