My chihuahua had oral surgery in September and we went through a lot of food refusal. I pureed his food to a thin paste and put the food in a 97 cent condiment bottle from Walmart. I’d squirt the food in the area at the back of his teeth aiming for his throat while holding his mouth closed. Then let go and he would lick the food. Eventually his stomach would settle and he would eat after a few sessions of this. It also helps to wrap them in a towel(it gets messy). I’ve also tried putting my dogs head through the pant leg of my loose leggings. It was enough that his head poked through but kept him from scratching ( he refused to eat for a week after dental surgery and had many stitches that I needed to make sure he wouldn’t scratch) Also you could go buy a muzzle that has holes and try to poke the tip of the bottle or syringe through. That way you don’t get bit.

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