I informed Helga that only about half of animals stricken with salt poisoning
survive, regardless of treatment heroics.
The Gays were convicted on the basis of complex calculations - and those sums were based on the "seminal paper" on salt poisoning
, which plays up child abuse in the context of Munchausen's Syndrome By Proxy.
A senior clinical biochemist spent two months on the case and concluded the high sodium levels were caused by salt poisoning
Dr Walters had concluded that "there is nothing in this case that can be explained by salt poisoning
that cannot be equally well explained by resetting of the osmostats".
Campaigners for the Gays claim new evidence has been uncovered disproving that Christian died from salt poisoning
and that, in fact, he died from natural causes.
Toddler Christian Blewitt died of salt poisoning
and head injuries in Birmingham Children's Hospital six weeks after moving to Ian and Angela Gay's.
But the 38-year-old still faces two alternative charges - both of which she denies - of assault by salt poisoning
over a four- year period or leaving the child brain damaged by her reckless conduct.
Mr Hilliard said: 'The salt poisoning
was the last event in a series designed to produce misleading symptoms in him.
Miss Macur said the couple had "inflicted two abusive episodes" - one was salt poisoning
, the other a head injury.
Asked why salt poisoning
was not considered earlier, he said: "It was, but I think the necessary steps were not taken to pursue that further.
Dr Walters had concluded that 'there is nothing in this case that can be explained by salt poisoning
that cannot be equally well explained by re-setting of the osmostats'.
He was admitted to Russells Hall Hospital, Dudley, just over a month later, on December 8, suffering salt poisoning
and brain injuries.