Lead poisoning is seen primarily in dogs less than one year old; the highest percentage of those are less than five months old. Many sources of lead are available to young dogs, although lead-based paint and linoleum are the principal problems. The characteristic clinical signs involve the gastrointestinal system (vomiting, colic and diarrhea), nervous system (hysteria, convulsions and nervousness) or both.
Bengfort, John and Carithers, Robert W.
"Lead Poisoning in Dogs,"
Iowa State University Veterinarian: Vol. 38
, Article 4.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol38/iss3/4