Yes, desire, call it what you will, will make a massive difference and should a 29" keen dog be compared with a, lets say 24" dog that lacks that desire then one could be forgiven for thinking they are the equivilant of a smaller dog. I had a 27 1/2" dog who was shit hot on rabbits, his attitude and gungho outlook seen him outclass many smaller dogs, however, compared to his sire who I also owned and ran in similiar conditions and who also had the gungho attitude who was only 24 1/2" there was no comparison.
Big dogs will catch decent bags and many with style, but against a smaller dog with h