I only put a teaspoon in if that, then I just put less in until it's dry kibble again.Just be aware that once you start adding "taste enhancers" or wet food to kibble, you're making a lifetime commitment. A dog that seems to forget his own name will still remember the best meal he's ever had and will not want to downgrade.
Can you feed them in separate rooms?The problem is my senior dog has always gotten wet food with dry so when my puppy sees him eat, she wants what he’s having.