Start with weight, breathing and the reason you went
Write down your fancy rat's weight, the reason for the visit, the vet's findings, any treatment, and the follow-up plan. Rats are intelligent, handleable and usually seen for a handful of recurring themes — breathing, skin, lumps and ageing changes — so a good note names which of those was discussed and what was ruled in or out. Record his age as you understand it and whether the vet adjusted expectations because of it, since advice for a six-month-old rat and a two-year-old rat can differ sharply even when the presenting sign looks the same.
Breathing and lumps: the rat-specific lines
Note exactly what the vet heard on the chest and what you were told about sounds at home, because a fancy rat's breathing history — when the sneezing started, whether it follows cage cleaning, whether cage mates sound the same — shapes every later decision. If a lump was found, write its location in findable words: left side, behind the front leg, pea-sized, movable or fixed, growing fast or unchanged since you first felt it. Add the vet's plan for it — monitor with a size check, recheck soon, or discuss removal — and the home measuring method you agreed, so 'has it grown?' becomes a comparison rather than a guess.
Cage mates, hierarchy and the home picture
Add what the vet asked about the group, because a fancy rat rarely lives alone and his record should reflect that. Note cage mates' health, any recent new arrivals, fighting or food guarding, and whether one rat is taking more than his share at the bowl. Write down bedding and cage details discussed at the visit — substrate type, hammock washing, ventilation — if breathing was the topic. If a separation or hospital cage was advised, record how it was set up and whether a companion stayed with him, since isolation itself affects a social rat's recovery and appetite.
Home care instructions, in working order
Copy the home instructions into the order of your day: what changes at feeding time, what to check during free-roam, and what to look for when you clean the cage. If the vet showed you how to feel for lump changes, check breathing at rest or offer food in a way that tests appetite, describe the method briefly. Write the call-back triggers as a concrete list — breathing effort visible at rest, porphyria around the eyes increasing, a lump ulcerating, eating stopping — rather than 'call if worse', which means nothing at midnight. Note the recheck date or interval and anything to bring, such as a video of the breathing or a photo series of the lump.
A record that grows with an ageing rat
Keep every visit under his name in one place, with weights in a simple running list so the trend is visible at a glance. Rats age visibly across a handful of visits, and the owner who can say 'he has lost weight steadily across the last three checks' gives the vet something an examination alone cannot. Filing each visit in KinsLe's Pet Passport keeps your fancy rat's breathing history, lump notes and weights together as one portable packet for any vet, boarder or trusted sitter.