generally its fine for the xrays just when they are really small i agree with zovick id watch the power. otherwise it should be fine.
Also I must add that if anyone can remember a few months ago I had a little hingeback which was off coloured and had a RI, she stuck his neck out etc, but after loads of effort she passed.
What's weird to me is that they just don't have mucus coming out of their nose like in other RI, perhaps this is just a hingeback thing? @Jacqui have you seen this in your hingebacks?