Why extra time at the water bowl matters in a senior cat
Noticing your senior cat spending more time drinking than she did last year is exactly the kind of quiet change worth the vet appointment you have made. Increased thirst in an older cat can accompany several body changes a vet will want to investigate, including kidney changes, thyroid imbalance, or shifts in how her body handles sugars, and it can also have simpler explanations such as a warmer house, a move to drier food, or a new water bowl she simply prefers. Nobody can sort those apart from the doorway of the kitchen. What you can do at home is keep her comfortable, keep conditions steady, and turn a vague impression of drinking more into a measured pattern the vet can use.
Make water easy, then measure it honestly
Place fresh water in a few quiet spots she already passes, away from the litter tray and not only beside her food, since some cats drink more readily from a separate location. Use the same main bowl each day, fill it to a marked line, and note how much is gone by the same time each evening, topping up from a measuring jug so refills are counted too. If she favors a running tap or a fountain, factor that in rather than forbidding it, and simply record that she drinks there as well. Do not restrict her water at any point while you measure: a thirsty senior cat needs free access at all times, and limiting intake would both distress her and corrupt the record you are building.
Read the litter tray as the other half of the story
Thirst only means something alongside output, so pay deliberate attention to the tray during the waiting days. Larger wet patches, more frequent urination, or a tray that needs changing sooner than it used to all belong in your notes, as do the opposites, since a cat drinking more but passing little is a different picture. Weigh her weekly as well, because thirst traveling with weight loss despite a good appetite tells the vet a sharper story than thirst alone. Keep her food, treats, and routine unchanged during this short window unless the vet practice advises otherwise, because every change you make blurs the pattern they will be trying to read from your record.
Know the signs that should not wait for the booked visit
Steady extra drinking in a bright, eating cat can usually wait for the appointment already made, but some companions to thirst should move you to phone the practice the same day. Call sooner if she stops eating, vomits repeatedly, becomes unusually tired or withdrawn, strains in the tray, or seems to be losing weight quickly. A sudden dramatic jump in drinking over a day or two also deserves a call rather than a wait, as does any episode of weakness or disorientation. When you phone, lead with the measured facts — how much she drank yesterday, what the tray showed, and when it started — because that is the information triage decisions are made from.
Hand the vet a pattern, not an impression
The value of your waiting days is the record: daily water amounts, litter notes, a weight or two, and the date you first noticed her lingering at the bowl. Set beside her previous blood and urine results, that record lets the vet judge whether this is new, stable, or progressing, and which tests to repeat first. Scattered on loose notes, the same facts lose their force, particularly if a different vet at the practice picks up her case. KinsLe keeps those pieces together in the Pet Passport, so your drinking log, tray notes, and your senior cat's past results arrive at the appointment as one clear, dated packet.