If the feed is poor in salt, and if no salt has been given for a long time, an intense "salt hunger" may occur that may lead an animal to eat a poisonous quantity, or an overdose of salt may be given by error as a drench.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
When it made its scheduled return with his replacement he was found dead from a tremendous overdose of sleeping pills.
"The Nothing Equation"
Tom Godwin