The condition that makes this appropriate at all
Assist-feeding is a veterinary instruction, not a home remedy to try because a cat looks thin. It belongs in a plan where the vet has examined your cat, decided assisted feeding is right for her condition, shown you the technique in person, and specified the food, consistency, amounts, and schedule. If any of that is missing, the correct step is a phone call, not a syringe. Never assist-feed a cat who is vomiting repeatedly, struggling to breathe, barely conscious, or unable to swallow, and never force food into a cat who turns away in distress; those are situations for the clinic itself.
Setting up exactly as you were shown
Prepare the food to the consistency the vet demonstrated, neither watery nor thick enough to need force, and draw up only the amount for this feed. Settle your cat in the position the clinic used, usually sitting or sternal on a towel on your lap or a table, at a calm time with no other pets around. Keep your notes sheet beside you before you begin, because you will not remember accurate amounts afterwards. Warmth, quiet, and an unhurried pace matter more than speed; a feed that takes twenty calm minutes succeeds where a five-minute struggle fails.
Pacing each mouthful around her swallowing
Give small amounts at a time into the side of her mouth as demonstrated, aiming for the cheek rather than the back of the throat, and wait for a clear swallow before offering more. Rushing is how food ends up inhaled instead of swallowed, so the pause between mouthfuls is the technique, not an interruption of it. Let her lick voluntarily at any point; a cat who starts taking food herself is progressing, and the syringe should support that, not override it. If food pools in her mouth or dribbles out repeatedly, stop and reassess rather than pushing on.
The stop signals that end a feed immediately
Stop the feed at once if she coughs, gags, retches, drools heavily, breathes faster or noisily, or fights in a way that risks hurting you both. Note what happened and how much she took before it. A single difficult feed after several calm ones is information for the vet, not a failure to hide. Phone the clinic the same day if she takes far less than the agreed amount across a day, if swallowing seems harder than at the demonstration, or if she seems weaker, because the plan may need changing rather than repeating.
Recording feeds so the vet can judge the plan
After every feed write down the time, the amount offered, the amount actually taken, and one line on how she coped. Also record water taken, toileting, and her general brightness, because the vet reviewing her will ask about the whole picture. This log is what turns your effort into a decision at the recheck: whether assisted feeding is sustaining her while treatment works, or whether she needs support the home cannot give. Bring the log to every appointment rather than summarizing it from memory.
Keeping every helper consistent
When more than one person feeds her, small differences in pace and amount creep in unless the routine is written and shared. Agree one method, the vet's method, and have each helper log their feed in the same place straight away. Sharing her assist-feeding schedule and log through Care Teams in KinsLe keeps every helper working from the vet's instructions, with each completed feed marked and timestamped so nothing is duplicated or missed.