Last year's Supreme Novices' runner-up suffered a discrete puncture to the sole of a hoof with champion trainer Henderson confirming it is still sore.
JP McManus' main hope for Champion Hurdle glory drifted to double figures on the exhanges for a brief moment but most firms reacted tentatively by easing the two-time Grade One winner to 5/1 from a general 9/2.
Henderson said: "My Tent Or Yours has a little puncture wound in his near-fore sole. We are looking at it as we speak and are pretty confident it won't affect his participation.
"We are designing a shoe to cover it but also have the facility to swim him if necessary. Any other day, with any other horse, this would not be significant."
Henderson added: "Nobody can guarantee anything but I am seriously hopeful everything will be all right.
"No trainer wants a problem at this stage, though. We are all praying for a trouble-free run but we don't seem to be getting one across the board.
"We've got all the experts here and we are working on it at the moment, it's just a matter of what we do and we will update everyone later."