I can't help about the engraving, but I just love the expressions on the dogs' faces. Looks like they're saying:
#1 setter - "With my master holding a 10 gauge 3 1/2", the most powerful shotgun in the world, do you feel lucky, chicken? Do ya?"
#2 setter - "What? You don't wanna play with me? Really?"
#3 pointer - "Come on, birdie, why are you going away? Please!"
#4 pointer - "Uh-oh, looks like I've pointed a grizzly!"
#5 Setter - "Pointing birds is as futile as life in general - pathetic if he misses, sad if he doesn't..."
#6 Setter - "Are you aware that the quail season isn't open yet?"
#7 Setter - "Wow! He hit that snipe! I can't believe it! Must've been a stray pellet..."
#8 Pointers "Strange birds... I don't wanna retrieve them" - "Don't worry Don, with our master's shooting I bet you won't have to"