Look at it this way, it's all a balancing act. You take away one thing, but have to replace it with something else to maintain health and nutritional needs. Vegetables are good, but you have to be careful as to what you give. I mean, and this is a bad example, but everyone thinks of salad as good for you, and it is, UNTIL you do what I like to do and smother it in cheese, meat, and dressing. As that point, you may as well have eaten the cheeseburger with an extra large order of fries. When it comes to diabetic diets, and I had no clue on this til I started digging into some of my recipes to figure out what I need to change when Molly got her diagnosis, there's two things you need to look into with various foods : sugars and carbs. Sometimes, they are the same thing, other times, they aren't. Basically like the sugar in an apple is a complex sugar that has nutritional value, while the sugar in a soft drink or candy bar is basically trash, just due to how they act in your body. In my case, I used to make a crockpot full of split pea soup about every other week, and the dogs love it (I'm sure the 1-1.5 pounds of pork I throw in doesn't hurt their feelings) as much as I do, but peas have more sugar than beans, so I now make bean soup instead. We like it just as much, and it has less sugar, fewer carbs, and more protein than the same recipe when made with split peas. I also tend to make a lot of asian dishes, mostly Japanese inspired. Well, Molly can't have much pasta and rice, so she just gets more meat, or some beans, and goes nuts over sea weed or squash. So I stir fry some squash and sea weed into the mix, and use maybe 1/3 to 1/2 the rice or pasta I used to. It's easy, but it is an adjustment. The pork I use is almost all wild hog, so it's low in fat compared to store bought, and I usually shoot one every 2-3 weeks, depending on how big a hog I get, and how far I try to stretch the meat between our meals and giving some away. The fish is the same, locally caught, mostly on trot lines since that's a good way to provide for me and mine without spending all day with a pole in hand when there;s other things I need to get done, like that work thing my boss insists I show up for.
As to diabetic dogs, according to my vet, it's a 1 in 500 chance on average of a dog becoming diabetic, and he said it has nothing to do with diet or anything like that, so it's not like human diabetes in that respect. It is purely hereditary. But as far as symptoms, treatment, etc, it is identical to human diabetes. So she's fine, just had to get used to a diet change, and getting an insulin injection every 12 hours or so. After a few months now, she knows she gets her shot after her meals, so she eats, then comes and lays next to the fridge (where her insulin is kept) to get her shot, and off she goes as soon as she gets it. I mean, I know she doesn't like it, but has accepted it as part of her routine, and doesn't give me any grief over it.