All pups go throw stages, some more than others. Could be a million diffrent things, could be our attitude? Could be perfectly normal, how many lurchers have you had? No judging if these are your first, but lurchers ain't for everybody, most are sensitive no matter the type, even the big bad bullx is usually as soft as fook with folk. Most pups iv had don't like folk walking behind then, can't relax always looking back. They grow out of it tho, but as a rule lurchers are more sensitive and highly strung as pups than most other breeds or types