Why the vet needs your log more than your summary
Itchy cats are investigated through patterns, and patterns are exactly what memory distorts. Owners remember the worst evening and forget the quiet week, so a vet hearing only a summary cannot tell whether the itching is seasonal, food-linked, stress-linked, or constant. A dated log converts your impressions into evidence: which days were bad, which body areas are involved, and what else happened on the bad days. Two weeks of honest notes will often narrow an investigation faster than any single test, because it shows the shape of the problem before anyone guesses at its cause.
What to write down each day
Keep the entry short enough that you will actually do it: date, an itch score for morning and evening, the body areas she scratched, chewed, or rubbed, and anything notable that day. Notable means meals and treats, time in the garden, new litter or bedding, cleaning products used near her, visitors, fireworks, or a household upset. Add flea-control dates exactly as given, because gaps in that record are themselves a clue. Photograph any redness, hair loss, scabs, or ear changes weekly in the same light, so progression is visible rather than argued about.
Reading the patterns your log can reveal
Certain shapes recur in itchy-cat investigations. Scratching concentrated on the face, ears, and neck suggests a different line of inquiry from chewing along the back and tail base, or licking the belly bare. Itching that spikes after outdoor time points outward; itching worst at night in one room points at something in that room; itching that follows particular meals by hours is worth flagging with the dates aligned. You are not diagnosing from these patterns — you are handing the vet a map that tells them where to look first.
Do not change everything while you track
The instinct to help by changing food, bedding, litter, and shampoo in the same week destroys the evidence. If a change helps, nobody knows which one did it; if it worsens things, nobody knows the culprit. During the tracking period keep her routine as steady as you reasonably can, and record any change you are forced to make with its date. If the vet later wants a controlled change, such as a feeding trial, it will be one change at a time with your log running throughout, which is what makes its result believable.
When scratching stops being a log-and-wait problem
Book sooner rather than completing your fortnight if the skin breaks, bleeds, or becomes infected-looking, if she scratches herself raw in one night, if her ears smell or she shakes her head persistently, or if she stops eating or hides away. Rapid hair loss, weight loss alongside the itching, or other pets or people in the house developing itchy skin also deserve a prompt call, because they widen what the vet needs to consider. Tracking supports an investigation; it never replaces one for a cat who is suffering now.
Arriving with evidence instead of impressions
At the appointment, hand over the log and the dated photos together rather than scrolling and summarising from memory. The vet can see the scores, the trigger days, and the body map in a minute, and plan the examination around them. Keeping that scratching log and photo record inside her Pet Passport in KinsLe means the evidence travels with her records to this vet, a referral, or a new clinic without being rebuilt.