Nicky Henderson is not giving up hope of Constitution Hill being able to defend his Unibet Champion Hurdle crown and will have his unbeaten superstar scoped again on Friday, after a below-par workout at Kempton Park on Tuesday put his participation in doubt.
As has become tradition, Henderson took several of his Festival contenders for a spin at the Sunbury circuit, including Constitution Hill, whose only start this season was in the Christmas Hurdle at Kempton.
Bookmakers were quick to suspend the betting markets in the wake of the work, and the Seven Barrows trainer said his superstar had scoped badly following it.
"Unfortunately, in a routine gallop this morning, Constitution Hill was very disappointing and it transpires, after the vet has scoped him, that there is evidence of mucus," said Henderson.
"We're taking a sample of it to a laboratory to analyse it, which will tell us about the significance of it and we should know more after that.
"Last week, he worked brilliantly and he was scoped 10 days ago, but these things happen, just like it did with him earlier in the year [having to miss Cheltenham on Trials day in January].
"Horses are like humans, look how many people had the awful cough around Christmas that took ages to get rid of."
He went on: "The vets still think it could clear up in a week and all his serious work has been done already, whether he makes it [to Cheltenham] will depend on the severity of it.
"He was disappointing this morning working with Sir Gino, who he has worked with in the past. He would normally go easily with him, but this morning he couldn't, so Nico [de Boinville] realised all was not well and wasn’t hard on him.
"Obviously, the mucus was affecting him. He’s not coughing, he’s just got a dirty picture, as we say.
"I’m not saying definitely either way and I’ll keep hoping. As you can imagine, it has come as a bit of a shock."
Giving an update later on his X account, Henderson said: "Following up on this morning’s situation with Constitution Hill, the sample from his tracheal wash has shown a small increase in the number of neutrophils which indicates a respiratory infection, which is significant but far from drastic.
"He will start a course of antibiotics immediately and we plan to rescope him on Friday in order to monitor which way this is going. He would only be having light exercise this week following this morning’s racecourse gallop.
"Both our own vet and the racecourse veterinary surgeon who scoped him feel we definitely have a chance of correcting this in time and we will be doing everything possible to do so. We have a fortnight to work him and it is possible, so we will keep everybody notified accordingly.
"He is absolutely fine within himself and we have simply got to get on top of this issue as quickly as possible."
Meanwhile, officials at Cheltenham expect the Festival to get underway on close to soft ground, with the start of the showpiece meeting now only a fortnight away.
Like much of the country, Prestbury Park has endured a predominantly wet winter, but a rare dry weekend has given clerk of the course Jon Pullin reason for optimism.
"As everyone will be very well aware, we've had a very wet build up this year," he said on Tuesday.
"Thankfully, the rain held off over the weekend and it’s the first 48 hours of dry weather we’ve had for a number of weeks, which has allowed us to at least get on and start to mow this week, which was very much needed, so I’m pleased that we got that window.
"We’d be soft ground, as you can imagine with the rain that we’ve had, and the cross country would be heavy in places as well."
