Our now departed Great Pyrenees always got the leftovers and was happy with them. Beef, pork, lamb, salmon, lasagna or whatever, the dog would scarf it right down.
Did this hurt the dog?
Didn't seem to.
I've been making up meat product with vegs for my two dogs and two cats and mix it with high quality kibble. I use 3 lbs each of ground turkey and beef, cooked with mixed vegs run thru the blender, put in containers and frozen. All four love it. I calculate it costs about 1/2 to 2/3 more than canned food...most of which have all sorts of garbage in them.
Generally no but I made the mistake of giving my two mini Aussies potato chips I was having with my beer. Now they go crazy when I get a beer from the fridge because they anticipate chips.
My old mastiff used to love apples and blueberries. She'd eat them right off the tree/bush. Around Halloween, she'd also end up eating the pumpkin. We've usually given all our about 1/8 cup of table scraps with their dog food.
My German imported Rottweiler got fed online sourced natural food 90% of the time and table scrap every time we ate. He loved it all, esp munching down on chicken bones, rib bones, etc. we rarely had throw away leftovers. He was the trash disposer.
Was healthy to the point we stopped taking him to the vet for checkups. There was simply no reason for shots, etc. lived a long and happy life sleeping in bed with my wife when I went to work at 3am. Lol.