Hey Malia! Is the CC your pet provided the apple/banana kind? Wick slurped that stuff up like a crazy bun bun.
I agree with Luna that perhaps Jett is being primed to not like it because getting into position may be freaking him out a tad. Once you get him in the best position, perhaps try keeping him there and just petting/pampering him during it. Keep your voice calm if he starts to freak out, put the syringe down, and pet him. Rinse and repeat until Jett is perhaps a bit more calm with the approaching syringe.
If he liked it the first time, he may be more comfortable eating it after he’s tasted a bit, so it’ll be really important to get him to taste it in as least a stressful scenario as possible. I know it’s difficult when they’re kicking and flailing, but it’s important Jett gets the nutrients needed to heal. Since you know Jett has a tendency to dash forward, mentally prepare yourself to keep your hand still around him so he can’t move forward or backwards. Like I said in a post before, just because you have your hand around his neck, doesn’t mean you’re choking your rabbit. Their jaw-bone and shoulder-blade bones naturally create a gap that you can use to your advantage, instead of squeezing the neck to get a hold. Ideally, the rabbit shouldn’t be able to move forward because they can’t squeeze their shoulders through your hand. I find that hold is easiest to get Wick to take his medications if he’s being more fussy than usual.
The soup-iness of the critical care mattered with Wick sometimes (and also with me, because if I made it too watery, I’d get it everywhere, haha), so maybe look at how much water you’re putting in. I went thick-pancake batter texture. Also sometimes Wick wasn’t into the syringe, so he’d lick it off my hand instead.
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.