I disagree on the shot guns not being developed. As herbivores they would also to be farmers, and avians can be a real pest to farmers.waylandson wrote:nor would they have developed shotguns as they were developed to hunt avians.
The reasons for developing shotgun like weapons would be very different, and might never see a military use, but they would still have something of the sort. Being much more massive, and thus probably able to stand a bigger recoil, I can see a K'Kree shotgun being much larger caliber than humans use, with a much larger pellet load and spread. Which could in turn wind up being effective against different beings.
Remember that with their militant vegetarian ways, K'Kree would probably develop a lot of weapon types designed to kill specific predator types - so while K'Kree vs K'Kree warfare might not develop the same sorts of weapons human's use, their "hunting" programs would, as well as possibly some other interesting variants. As they met other races, those variants might prove adept to using in their combat.
Overall, I don't think they would be very ecologically friendly as a race. Meat eaters and predators represent a direct threat to them, while other herbivores would be competitors for the same food sources. Anything that eats or otherwise destroys their crops would be a bane to them too. If you look at Earth's own history, farmers tend to put their crops before anything else, freely cutting down trees, diverting and damming water sources, plowing under anything that isn't their crop, and using poisons and weapons to kill of birds, insects and anything else that would eat their crops. A K'Kree farmer would be no different in that regard.
I wouldn't be surprised if the K'Kree had 2-3 dozen other species they considered essential, and everything else could go to heck in a handbasket. Those species would be things like voracious insect eaters, natural fertilizers and weedeaters, guard animals, etc. The use of draft animals would likely be a late development for them, given their own size.
Early vehicles would likely be sleds/dredges they pulled behind them, later would be larger versions they pulled as a family. They're probably one of the largest animals on their own planet - I simply can't see them domesticating a bigger herbivore that consumes more resources than they do* - so they would likely skip straight to mechanizing those vehicles. Those would probably be trains and ships, followed later by airships (as previously mentioned), then onto grav vehicles and starships.
* as omnivores, a larger animal not only does more work for us, but in addition to consuming resources, is potentially a food/material's resource itself. This leads to an interesting point - we humans regularly use food animals such as cows and pigs for materials, primarily leather. Since K'Kree wouldn't be slaughtering animals as food, one might think it's unlikely that they would use leather at all. I would make the suggestion that what better use to put those carnivores they slaughter to than to make leather - provided, of course, that they could stand the smell of it afterwards.