I know nothing about what you are dealing with. However I recieved an urgent Facebook plea from Nancy at Erinsedge.
She was IMHO one of RTF's premier authorities on dog health and breeding. I have vnever met her, but she has helped me immeasurably in the past, and likely saved a dogs life For whatever reason Nancy can no longer post on herel to advise you.
She related that she has personally lost a dog to this, and states that AIHA is commonly misunderstood, and that the advice you have been given is insufficient. Please contact her at Erinsedge@charter.net and she will be grateful to share what she knows and has learned since the tragic loss of her dog