grey x lab has been around a very long time, I had one back in the early 70s a complete allround dog, Rabbit, Hare,deer, and very usefull on the rivers carrying the cord of the shackle net across the river, nose, speed, stamina, and great feet on him, and very intelligent, also good watch dog around the yard, very alert,
Sounds a like a handy dog to have around that b l.