Same thing happened to my dog
I put it down to total lack of runs on the lamp
Also running him in tandem with a lad who was using an air rifle
Didn't like the gun so when he caught one he would bugger off then come back without the rabbit
Cant stand competition from other dogs aswell seems to hunt for himself when other dogs are on the scene
I decided to take him on is own ferreting.
He bonded up lovely .Marked up stayed close on. Kept back from the holes aswell but what really impressed me was when a rabbit came to the net,instead of running in he waited until it was clear