The rule of thumb is that you do not eat anything smart enough to ask you not to eat them.
Space dolphins have language, so they are sentient, but they will never invent fire or the wheel. Millions of them can co-ordinate to attack a star ship, so they have a strict societal structure, and clearly not animals, even though ants and bees can perform similar tasks in microcosm.
I wasn't saying that they are dumb enough to be treated as animals, I was asking what if they were animals? If they were not talkative and sentient. One of the producers decided that the Dolphins would talk in broken English, so that it would seem like they were dummies, when almost everyone else except the Pakleds sounded like a 20th century American.
Here's the drone argument.
If they are killed by phaser fire, from a hand weapon how on earth do they survive colliding against the ships shields causing enough damage to reduce the shields? Every Space Dolphin that struck the shield must have died. Hundreds, maybe thousands of space dolphins striking the shields per second for dozens of hours, and days, and if the ship had made it to Earth, hundreds, maybe thousands of dolphin strikes per second for years.
Dead. All of those millions dolphins died, to try and break Equinox and Voyager's shields, when Ransom only needed 66 more of space dolphin corpses to get home.
Did the Dolphin Commander ask for the suicides of millions to avenge the deaths of 10s? Or are we misunderstanding the nature of Spacedolphin life? Is it possible that there was no loss of life as each Dolphin exploded into paste colliding with federation shields?
We have seen hive minds before.