RE: Question - lead shot in dogs
I am a toxicologist andI do a lot of work with heavy metals. Lead poisoning is primarily through oral routes -- eating paint chips. For rats, the lethal dose that kills 50% of the population (LD50)is 70 mg/kg when administered intraveinously.
Bottom line - it would take one hell of a lot more lead than 4 or 5 #7.5 pellets to lead poison a dog the size of a lab to the point of death. I would expect his body to form a granuloma or some other sort of encapsulating tissue around the pellets.