Greetings
jaerome1,
Lead toxicity is a very concerning thing, I can understand why you are worried. In the "Chicken Health" book, by Gail Damerow, she details the effects of lead toxicity in chickens, from not being apparent, to having symptoms like, listlessness, increased thirst, decreased appetite, emaciation and green tinged droppings. The chicken may grow weak, wings drooping, and young birds die quicker than older birds.
And even when there are no symptoms, the eggs may contain lead! Of course this is dependent, on the amount and duration, that the hens consumed the lead. This can impact the health of pregnant women and children, who eat the eggs on a regular basis.
Dealing with lead toxicity is a two part procedure:
First, remove the source of the toxic lead.
Next, chelative therapy. Your vet could have prescribed good chelation medications, but since he didn't here is one recommended by the ASPCA.
Activated Charcoal (Purchase over the counter)
The recommended dose of activated charcoal for all species of animals is 1-3 gm/kg body weight. Duration was not listed, but the duration for people is 2-4 weeks.
Finally, supportive therapy for birds that are in need.
electrolytes, antibiotic for infection due to suppressed immune system, vitamins B12 and B1, antifungal for crop problems, Magnesium Sulphate.
Gail Damerow, The Chicken Health Handbook, 2nd Edition, Storey, 2015, Print.
Page 314
Jill A. Richardson, DVM, Christine Allen, CVT, ASPCA Tips to Manage a Poison Emergency, http://www.vspn.org/library/misc/VSPN_M01158.htm
Copyright 2018
Samour, Jaime. Avian Medicine, Third Ed. , Elsevier, 2016, Print.
For testing of eggs, call your local county extension office for advice on where to have eggs tested.
For more information on lead contamination call the National Lead Information Center:
1-800-424-5323
This is my contribution, I hope the information is of some help.
God Bless