Heard others say that aswell but I don't like to let a youngster watch another dog lamp, they can get frustrated wanting to be off chasing and while let out a yip or two when pulling on the strap.
As some have said the penny will drop through time and it shouldn't take long.
I sometimes take a mate with me when I'm starting a young dog. I get him to bring his air rifle and shoot a few on the lamp, if he knocks them over it's an easy retrieve for the pup and even if he wings the rabbit it gives the pup a better chance.
the dog will need to learn not to yelp when another dog is worki