I am not sure when he ate it. I just got home and found the mess.
He may have eaten one small onion, 1 1/2 " in diameter and a clove or 2 of garlic. I believe that is the most but it could have been less. I have 2 other smaller dogs but they don't get up on the counter.
I do not have hydrogen peroxide.
Thank you. I will watch him. He seems fine now with pink gums but I will keep checking and get him in if he fades. Thanks again!