On Wednesday, at the opening day of the Hawke's Bay Show, he will be one of 11 young people who will saddle up as part of the Riding for the Disabled category.
"It's a great opportunity for these children to take part in the show," Hastings group's programme co-ordinator Ruth Holmes said.
She said the link with the Hawke's Bay Show went back to the 1970s and that the A&P Society had always been supportive of the association.
She said the young riders, aged 3 to 12, would ride in separate classes according to their abilities, with each given a special coloured riding ribbon which she said they were proud to wear.
Mrs Holmes said watching Ethan's progress had been "very satisfying".
The riding had complemented his other therapies and there had been a noticeable improvement in his core strength, balance and importantly, his general confidence, she said.
The youngster had been referred to Riding for the Disabled by Hawke's Bay Hospital specialists, and the results were there to see, Mrs Coombe said.
"Riding on a horse mimics walking - the rocking from side to side," she said.
"It is helping him overcome his physical issues."
The youngster was now happily up and about with "reasonable" balance and control, she said and riding his favourite horse, Sophie, every Tuesday morning at the association's Murdoch Rd site had been a big part of achieving that.
"He loves it - no fear at all," Mrs Coombe said, adding Ethan had more courage than she did when it came to getting on a horse. "I never could, but I know that one day he is going to ask me to get on too. I'll sort that out when the time comes."