Ok have spoken to vet who said that he probably has a secondary infection from the ulcers so we are keeping him on the full dose of omoguard for another 3 weeks plus putting him on antibiotics and if he hasnt improved by then he will have to go to Murdoch to be scoped.
She is an experienced vet of thoroughbreds and breeds her own so she sounds like she knows what she is on about.
I might try and get some slippery elm as well. Does anyone know if you can feed that and all the other meds together. I know with humans you need to be careful when mixing herbs and drugs.