My lot of half x beddlington whippets, alot of people under estimate these little dogs and can have quite a shock when they see them out doing there job, i cant speak for every one and all dogs are diffrent but mine will do everything i ask day and night they are just as fast as any pure whippet and as hard as any bull x , i found the are hardy dogs and never seem to get layed up and with there good coats protecting them in thick cover , and more than capable of a full days graft