It does this by keeping poisonous lead out of their gizzard and intestines (Northern Prairie Wildlife Research Center). This is the reason that lead shot was banned from use for waterfowl and in some states Upland bird hunting. Birds ingest the lead pellets when they are getting rocks for their gizzard, which help break down their food. They have found greater amounts of lead in bottom feeding ducks such as blue winged teal and canvas back. Research has shown that twelve percent of fowl in 1990 had ingested at least one piece of shot and six percent had ingested two or more ( Northern Prairie Wildlife Research Center
It does this by keeping poisonous lead out of their gizzard and intestines (Northern Prairie Wildlife Research Center). This is the reason that lead shot was banned from use for waterfowl and in some states Upland bird hunting. Birds ingest the lead pellets when they are getting rocks for their gizzard, which help break down their food. They have found greater amounts of lead in bottom feeding ducks such as blue winged teal and canvas back. Research has shown that twelve percent of fowl in 1990 had ingested at least one piece of shot and six percent had ingested two or more ( Northern Prairie Wildlife Research Center