
Actually we musn't give them any human food at all in the 1st place. (At least not marinated food)
But with them looking at us with those puppy eyes we often can't resist giving them some. And most dogs with sensitive stomach often gets tummy aches. (Even when there are no garlic nor onions in it.)
The number 1 Legendary Beast killed by food poisoning would be tragic LOL...

i knew about the garlic onions and puppy eyes but not about marinating being bad... thinking about it makes sense i suppose(⊙…⊙ ) thanks for the tip (●'◡'●)ノ

Also chocolate. Don't give dogs chocolate. chocolate can ruin their blood, so it doesn't coagulate the way it's suposed to.
...Garlic is also toxic to dogs... At the point that if he knew and thought Feru had a digestive system similar to a dog, he should not have even let Feru try it...
But as a legendary beast, it seems reasonable that garlic will not kill him.