You could potentially have a dead bird if you don't get the meds in him. Harsh but true, so lets get over the fear of the grudge and get on with it. You can make friends again later.
When we've had tricky med takers, we fill one syringe with yummy, irrisistable food and one syringe with the meds and swap them out mid feeds so they get all their meds (bit by bit) but they keep coming back for the yummy food.
OR. With Bruce, we simply had to hold on to him (hands holding his wings to his side, with his head between my index and middle finger) and put the syringe in his mouth, but make sure it's on the LEFT side of his mouth and start pushing slowly on the syringe. You don't want to blast it all on his mouth, but make sure he's lapping it up. You just hold him and his head in position and go.
Might be easier with two people and you might get bit a lot, but it's fast, 'easy' and you make sure he gets his meds.
Depending on which pet needs what, we take different approaches. With our buns we put their meds on their paw if they wont take it and they'll clean themselves up. (If it's not too liquidy) which obviously isn't possible with a fid.
Good luck, please ask for more help if you're still not able to get the meds in him. I know it can be frustrating. Our bunny who recently passed away refused outright on so many meds and it was so stressful, so I really do know your pain with is. Please just ask and we'll see if there's any way we can help you get around it.
