Our pets have a tendency to chew on things that we wouldn’t expect them to. This leads to poisonings and toxicities that can make them quite ill. Lead is one such toxic material, which is most commonly found in household items such as paint, linoleum and plumbing supplies. This applies more closely to old houses as newer materials are less likely to contain lead. Lead is also found in car batteries, golf balls and fishing weights. Here's some infomation on lead poisoning in dogs and lead poisoning in cats.