We appreciate you reaching out to us.
Garlic, and onions are all bad to cats. Cooked salmon shouldn’t be a big problem.
Keep an eye on your pet for a couple of days. If symptoms emerge, take your pet to the veterinarian or let me know.
Please do not hesitate to ask any further questions you may have. Thank you.

My cat was accidentally fed a small piece of cooked salmon that was boiled in water with garlic and onion
Should I make a vet appt?

My cat was fed a piece of cooked salmon boiled in garlic