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When pet parents ask “Is he slowing down?”, see what’s really happening.

Pet parents auto-share walk data with your clinic, so you can see what’s changed since the last visit.

No collar. Free to download.

MiloGolden Retriever · 8 y

Sarah asks

“Is he slowing down?”

Yes.

Down 0.5 mph since his last visit (14 Apr).

Weekly Stamina from 6 Apr to 18 Oct, from 304 walks with a reading: 2.9 mph in the week of 6 Apr, 2.4 mph in the week of 12 Oct. Highest week 3.0 mph, lowest 2.4 mph. Last visit 14 Apr. Usual for dogs on Tails: 2.5 to 3.0 mph. Joint & lung issues: 2.0 to 2.4 mph.

Amber: speeds seen with joint or lung disease (Swimmer & Rozanski 2011; Reicher et al. 2020).
Open Milo in the demo clinic

Slowing down is often a health issue, not old age.

Pet parents can’t tell you when it started, and a nervous dog won’t show you in the exam room. His walks can.

See his walks, stool and weight since his last visit.

Milo’s Stamina fell from 2.9 mph in April to 2.4 now, while he gained 2.5 lb.

Milo

Golden Retriever 8 y MN 73.0 lb

Pet parent: Sarah Chen Sharing since 2 Mar 2026

Today 09:20 · Senior wellness

Each bar is a week since his last visit (14 Apr). % compares last week with the first.

Goals met

Last week

64

Goals met last week, out of 100 points from the walk goals Sarah set: Stool 10 of 15, Sniff time 12 of 15, Walks 12 of 25, Stamina 12 of 20, Walk time 18 of 25.

From walk goals Sarah set. Not a health measure.

Stamina

Down 16%

2.4mph

2.4 mph last week, 2.9 mph in the week before his last visit. Usual for dogs on Tails 2.5 to 3.0 mph. Joint & lung issues 2.0 to 2.4 mph.

Walks

Down 46%

7of 14

Walks per week: week before his last visit 13, week of 20 Apr 14, week of 27 Apr 13, week of 4 May 14, week of 11 May 14, week of 18 May 13, week of 25 May 14, week of 1 Jun 13, week of 8 Jun 14, week of 15 Jun 14, week of 22 Jun 13, week of 29 Jun 14, week of 6 Jul 14, week of 13 Jul 13, week of 20 Jul 13, week of 27 Jul 12, week of 3 Aug 12, week of 10 Aug 12, week of 17 Aug 11, week of 24 Aug 10, week of 31 Aug 10, week of 7 Sep 9, week of 14 Sep 9, week of 21 Sep 8, week of 28 Sep 8, week of 5 Oct 7, week of 12 Oct 7.

Dashed: Sarah’s goal, 14 walks a week.

Walk time

Down 55%

3hr29min

Walk time per week: week before his last visit 7 hr 40 min, week of 20 Apr 8 hr 8 min, week of 27 Apr 7 hr 12 min, week of 4 May 8 hr 10 min, week of 11 May 8 hr 1 min, week of 18 May 7 hr 35 min, week of 25 May 8 hr 24 min, week of 1 Jun 7 hr 24 min, week of 8 Jun 8 hr 1 min, week of 15 Jun 7 hr 32 min, week of 22 Jun 7 hr 14 min, week of 29 Jun 8 hr 7 min, week of 6 Jul 7 hr 48 min, week of 13 Jul 7 hr 25 min, week of 20 Jul 7 hr 3 min, week of 27 Jul 6 hr 44 min, week of 3 Aug 6 hr 37 min, week of 10 Aug 6 hr 34 min, week of 17 Aug 5 hr 39 min, week of 24 Aug 5 hr 31 min, week of 31 Aug 5 hr 9 min, week of 7 Sep 4 hr 42 min, week of 14 Sep 4 hr 50 min, week of 21 Sep 4 hr, week of 28 Sep 4 hr 5 min, week of 5 Oct 3 hr 39 min, week of 12 Oct 3 hr 29 min.

Dashed: Sarah’s goal, 4 hr 40 min a week.

Distance

Down 70%

4.1mi

Distance per week: week before his last visit 13.8 mi, week of 20 Apr 14.6 mi, week of 27 Apr 13.0 mi, week of 4 May 14.7 mi, week of 11 May 14.4 mi, week of 18 May 13.7 mi, week of 25 May 15.1 mi, week of 1 Jun 13.3 mi, week of 8 Jun 14.4 mi, week of 15 Jun 13.6 mi, week of 22 Jun 13.0 mi, week of 29 Jun 14.6 mi, week of 6 Jul 14.0 mi, week of 13 Jul 13.2 mi, week of 20 Jul 12.2 mi, week of 27 Jul 11.3 mi, week of 3 Aug 10.8 mi, week of 10 Aug 10.4 mi, week of 17 Aug 8.6 mi, week of 24 Aug 8.1 mi, week of 31 Aug 7.4 mi, week of 7 Sep 6.5 mi, week of 14 Sep 6.5 mi, week of 21 Sep 5.2 mi, week of 28 Sep 5.1 mi, week of 5 Oct 4.4 mi, week of 12 Oct 4.1 mi.

Sniff timeestimated

Down 13%

86min

Estimated sniff time per week: week before his last visit 99 min, week of 20 Apr 1 hr 46 min, week of 27 Apr 89 min, week of 4 May 1 hr 40 min, week of 11 May 1 hr 42 min, week of 18 May 1 hr 44 min, week of 25 May 1 hr 49 min, week of 1 Jun 97 min, week of 8 Jun 1 hr 46 min, week of 15 Jun 1 hr 40 min, week of 22 Jun 1 hr 41 min, week of 29 Jun 1 hr 47 min, week of 6 Jul 1 hr 47 min, week of 13 Jul 95 min, week of 20 Jul 1 hr 50 min, week of 27 Jul 97 min, week of 3 Aug 1 hr 40 min, week of 10 Aug 1 hr 47 min, week of 17 Aug 99 min, week of 24 Aug 1 hr 43 min, week of 31 Aug 1 hr 41 min, week of 7 Sep 96 min, week of 14 Sep 98 min, week of 21 Sep 95 min, week of 28 Sep 87 min, week of 5 Oct 86 min, week of 12 Oct 86 min.

From pauses on the walk.

Stoollogged

No change

6of 7 ideal

Stools logged per week: week before his last visit 1 firm, 6 ideal; week of 20 Apr 2 firm, 7 ideal; week of 27 Apr 7 ideal; week of 4 May 1 firm, 7 ideal; week of 11 May 1 hard, 6 ideal; week of 18 May 2 firm, 3 ideal; week of 25 May 2 firm, 7 ideal; week of 1 Jun 9 ideal; week of 8 Jun 1 firm, 8 ideal; week of 15 Jun 1 firm, 5 ideal; week of 22 Jun 1 hard, 1 firm, 9 ideal; week of 29 Jun 8 ideal; week of 6 Jul 1 hard, 2 firm, 5 ideal; week of 13 Jul 2 firm, 6 ideal; week of 20 Jul 10 ideal; week of 27 Jul 2 firm, 5 ideal; week of 3 Aug 2 firm, 4 ideal; week of 10 Aug 1 firm, 4 ideal; week of 17 Aug 2 ideal, 6 soft, 3 wet; week of 24 Aug 1 firm, 5 ideal; week of 31 Aug 1 firm, 6 ideal; week of 7 Sep 3 ideal; week of 14 Sep 1 hard, 2 firm, 3 ideal; week of 21 Sep 1 firm, 7 ideal; week of 28 Sep 1 hard, 1 firm, 6 ideal; week of 5 Oct 9 ideal; week of 12 Oct 1 firm, 6 ideal.

  • Hard
  • Firm
  • Ideal
  • Soft
  • Wet

Weight

Up 4%

73.0lb

Weigh-ins: 70.5 lb on 14 Apr, 70.8 lb on 24 May, 71.0 lb on 28 Jun, 71.4 lb on 26 Jul, 72.1 lb on 30 Aug, 72.5 lb on 27 Sep, 73.0 lb on 18 Oct. 70.5 lb at his last visit.

Weigh-ins since April.

Behind these numbers

Since 14 Apr

Walks
318
With a Stamina reading
293
Last walk
Today 07:20

See when they slowed, and how you helped.

Pepper slowed into the amber range in July. After her new pain medication on 8 Sep, she’s back to 2.8 mph.

Pepper · Border Collie · 10 y

Weekly Stamina from 6 Apr to 18 Oct, from 217 walks with a reading: 2.9 mph in the week of 6 Apr, 2.8 mph in the week of 12 Oct. Highest week 2.9 mph, lowest 2.3 mph. Last visit 1 Sep. 8 Sep: Started new pain medication. Usual for dogs on Tails: 2.5 to 3.0 mph. Joint & lung issues: 2.0 to 2.4 mph.

Weekly Stamina in mph.

Amber, 2.0–2.4 mph: dogs with lung disease averaged 2.4 in a 6-minute walk test (Swimmer & Rozanski 2011); dogs with hip or elbow arthritis averaged 2.2 on a short walkway (Reicher et al. 2020). Tails chose the 2.0 floor; no study sets it.

Everyday walks become a 6-minute walk test.

Stamina is a dog’s speed over the fastest 6 minutes of each walk, from the phone the pet parent already carries. One slow day barely moves the weekly trend.

Taken outdoors, not in a clinic hallway.

How you get their walks.

  1. Give pet parents your clinic code.

    They download Tails, free, and type it in. Nothing to buy or wear.

  2. They walk their dog like they always do.

    Their phone records every walk: speed, time and distance. They tap to log poop and weight.

  3. You see what changed before they arrive.

    “He seems slower” comes with his walks since the last visit, so you can decide sooner.

Tails gives clinicians and pet parents the confidence to say “yes” to additional tests.

Need custom data? We’ll build it.

Tell us what you track for your patients, like rest stops on walks, walks after surgery, or a symptom the pet parent logs. We’ll add it to your clinic view.

Tails is

  • Shared by the pet parent, between visits
  • Measured on everyday walks, no collar
  • Clear about how many walks it’s based on

Tails isn’t

  • A diagnosis
  • A standardized in-clinic walk test
  • A medical device or a substitute for your exam

Questions

Does Tails diagnose anything?

No. Tails never diagnoses. It shows what changed and when. Why is your call.

How is Stamina measured?

With the phone’s GPS: the dog’s speed over his fastest 6 minutes on each walk.

What does it cost pet parents?

Tails is free to download on iOS and Android.

See six sample patients in a demo clinic.

Four are booked today. Each opens on the pet parent’s question, then what changed since the last visit.