Senior Dog Health Tracking: What Changes to Watch For (and Record)

Your vet says your dog is officially a senior. The appointments get more frequent, the bloodwork panels get longer, and the notebook on the fridge where you jot down when she seems "off" starts to feel thin. What you track between visits now carries real weight.

Here's what to pay attention to in an aging dog, and how to record it so your vet can actually use it. None of this replaces an exam. Think of it as giving your vet a better starting point.

When is a dog considered senior?

There's no single birthday for it. Size drives most of the difference. Under the 2023 AAHA life-stage guidelines, giant breeds reach their senior years around age 6, large breeds around 7, and medium breeds around 9. Small breeds get there later, often closer to 11 or 12. A Great Dane and a Chihuahua born the same week are on very different clocks.

Senior is a health status as much as a number. Your vet weighs your dog's individual trajectory, breed, and history, so treat these ages as a cue to start watching more closely rather than a hard line. The practical takeaway: once your dog hits the senior range for her size, the small changes you notice at home become worth writing down.

The health changes that matter most

A few patterns are worth recording with dates so your vet can see the trend, not just today's snapshot:

• Weight. A monthly weigh-in catches slow muscle loss or unexplained gain long before it's obvious by eye. Even a home bathroom scale (weigh yourself, then weigh yourself holding her, subtract) gives a usable number.
• Thirst and urination. A clear jump in how much your dog drinks or how often she needs to go out can be one of the earlier signs of kidney disease or diabetes, both common in older dogs. Note when it started; don't wait for the next routine visit to mention it.
• Appetite. Both a drop and a sudden increase are worth a note, along with whether she's still interested in food but eating less, or skipping meals entirely.
• Mobility. When did she start hesitating at the stairs, taking the ramp, or slowing on walks? Stiffness that's worse in the morning or after rest is the kind of detail that's easy to forget by appointment day.
• New lumps and skin or coat changes. Run your hands over her every week or two. Record where a lump is, roughly how big, and when you first felt it, so your vet can tell what's new and what's changed.
• Behavior and sleep. Pacing or restlessness at night, sleeping more in the day, getting stuck in corners, or seeming lost in a familiar room can point to canine cognitive dysfunction. Vets group these signs under disorientation, changed interactions, sleep changes, lost house-training, activity shifts, and anxiety. A short dated note when you notice something helps.

Why your records are worth more now

A single bloodwork result is a snapshot. The same panel over three years is a story. When your vet can line up kidney values, thyroid levels, and liver markers across visits, gradual drift shows up earlier than it would on any one report. The trend is where early answers live.

There's a second benefit. When the history is already in front of your vet, the appointment goes toward your dog instead of toward reconstructing what happened last spring. Forwarding each vet email into a tool like Wagabond Pets keeps that timeline building on its own, so the trend is there when you need it.

Sharing records with specialists

Senior dogs often pick up conditions that mean a referral to a cardiologist, neurologist, or oncologist who has never met your dog. Starting from a blank page burns appointment time and sometimes leads to duplicate testing you've already paid for once.

A complete chronological timeline fixes that. Share a link with a new specialist before the visit and they arrive already knowing the history, the current medication list, and the prior test results. The same share works for a sitter or boarding facility while you're away.

Wagabond Pets builds that timeline from the vet emails you forward. OCR pulls out vaccinations, medications, and weights into your dog's profile, and color-coded weight and vaccination tracking makes a trend easy to spot at a glance. When a specialist or sitter needs the picture, you send a secure link or QR code. It's on iOS, and the value grows as the record gets longer. If you're caring for an aging dog, that's the moment a running history earns its keep.