? collie lurcher ? 3/4 grey presume you mean thats 1/4 collieCollie put over a 3/4 bred I think he means bud the parents of the dam were grey x 3/4 grey 1/4 collie and the dam was put to collie so they work out around 5/8 collie 3/8 grey, they're a cracking litter and shoulkd make cracking mooching/ferreting/hunt up curs.
So the dam is 7/8 greyhound 1/8 collie
Or was both parents to the dam bred greyhound x 3/4 greyhound 1/4 collie?? :-)