You're speaking with Dr. Michael Salkin. Welcome to JustAnswer.
Sarah, can you tell me the active ingredient in this "spot on"?
I understand, Carl. Without knowing what those drops contained we can't know which adverse effects, if any, are expected. I have to refer you back to your parrot's vet for that information. Birds can replace their blood very rapidly and so blood loss isn't expected to be causing his malaise. Please continue our conversation if you wish.
You're welcome. I can't set a follow-up in this venue so please return to our conversation - even after rating - with an update at your convenience.