Old Mordin fancies Rock On Ruby for the Champion Hurdle but gives his sire a bit of a write-up this month:
"
Rock On Ruby's sire, Oscar, is renowned as a producer of three mile chasers. But if you look at the Champion Hurdle betting you'll find that four of the twenty horses listed at 33-1 or less are offspring of Oscar (Peddler's Cross, Oscar Whisky, Oscars Well and Rock On Ruby).
It strikes me that Oscar has still not had that many years as a jumps stallion to make definite statements about the preferences of his progeny. It could well be that in time they'll be seen as more likely to do well in short hurdles.
This season the big objective for Rock On Ruby is the Aintree Hurdle over two and a half miles. That seems sensible but the trouble is it comes only a few weeks after Cheltenham. So unless Rock On Ruby is kept out of the Champion Hurdle (which at this stage looks unlikely) he may well not be fresh enough to produce his best at Aintree. This was certainly the case last year when he got beat over twenty lengths in a Grade 2 at Aintree 24 days after losing the Grade 1 Neptune by only a short head at Cheltenham."
http://www.nickmordin.com/uk.htm