Probably can take some deerhound crosses to mature up to two years, especially some males, but this certainly dosnt mean they dont start to work till that age, Ive had a couple of first crossers, a bitch and a dog, both were killing rabbits before a year old, the dog acted like a pup till he was 3, but Ive seen some saluki crosses that acted like pups all their lives but killed well, on the fens, grab the bitch by the scruff of the neck she would squeal the place down, but she ripped fox to bits. Every pure bred deerhound that Ive also owned killed before a year old, the best modern day cours