I rather like #1 though feel it is slightly soft, could be my monitor.
#2 suffers from losing his back legs, a common problem with German Shepherds (and his front)
I like #6 the best as it has activity and only suffers from the loss of the tip of the dark dogs tail.
#1 Nice, great catch lights
#2 Composition is a bit off for me, does the knee crop rule go for dogs too? Would clone the tail out too.
#3 Lovely shot, would be nicer if the empty space was in front not behind
#4 Is fab, would be my pick of the bunch
#5 Cracking action shot can't see what he's trying to catch??
#6 Makes me laugh, looks like a mere cat, shame about the loss of the tail
Lovely photos
You know me, I can't resist a tinker