I was curious as to why garlic is considered poisonous to dogs. Because it seemed to come out of nowhere some years ago. It seems it relates to some research in around 2000 in which dogs were fed rather large amounts of garlic over a short period of time. I found this overview (with references) on a Scholar Google search. It looks like a toxic dose for Hei Long would be 4 cloves of garlic every day. Bruna, at 35kg would need to eat 14. (It’s about 8 cloves for a 20kg dog). That’s a lot of garlic.
https://www.researchgate.net/profile/Anton-Beynen/publication/341478976_Beynen_AC_2020_Garlic_oil_in_dog_food/links/5ec3527a458515626cb4c6f8/Beynen-AC-2020-Garlic-oil-in-dog-food.pdf