A small herder with very little spare
Yes, a log suits the Pyrenean Shepherd particularly well because this breed runs lean by design and works hard by instinct. The Pyr Shep is a small-to-medium French herding dog — quick, intense, and famously tireless — with a naturally light, athletic build and a rough or smooth coat that, usefully, hides far less than a heavy herder's would. The risk here is less hidden fat than unnoticed loss: a dog who burns enormous energy in herding, hiking, or dog sports and who may eat like a bird when he is excited can slide downward in condition while still looking bright and wiry. A dated log, kept honestly, notices the slide weeks before his outline changes.
A weighing routine for a dog who never sits still
Pick a calm moment — after morning exercise, before breakfast — and make the scale a trained, rewarded station rather than a wrestling match, because this clever breed remembers routines exactly. Weigh puppies every two weeks through their main growth, then monthly for adults, adding an entry after any intense training block, trial weekend, illness, or spell of boarding. Use the same scale each time; on a light-framed dog, small absolute changes are proportionally large, so consistency of method matters more than it does for a heavy breed where a collar's weight is rounding error.
Recording the workload beside the weight
For this breed, the notes column is where the log becomes genuinely useful. Record training days, herding work, long hikes, and competition weekends; record appetite in plain terms — finished eagerly, picked, skipped — because a wired Pyr Shep under-stimulated or over-stimulated can go off food in ways that show up on the scale a fortnight later. Note food changes and measured amounts. When a low entry appears, you should be able to look back and answer whether he earned it through work, lost it through a fussy patch, or dropped it for no visible reason at all — and each answer leads somewhere different.
Growth pattern and the working adult
A Pyrenean Shepherd puppy should gain steadily and stay rib-cover light rather than roly-poly; this breed is never meant to look padded, so judge the puppy by steady progress and easy-to-feel but covered ribs, not by roundness. Adults mature into a narrow normal band, and your log's job is to define your individual dog's band across a year that includes both his busiest and quietest months. A working adult who returns to the same range after each heavy block is a dog whose feeding is right; one who finishes each season a touch lighter is showing you a feeding plan that lags his workload.
When the lean line drops too far
Contact your veterinarian if the weight falls across two or three entries without a matching rise in work, if a puppy stops gaining, if ribs and hip points become sharp rather than simply feelable, or if appetite, stamina, or coat condition declines with the number. Prompt, dated evidence turns a vague worry about a thin dog into a clear history a vet can act on. Housing that history in his KinsLe Pet Passport keeps his working weights with his health records, so a vet, trainer, or sitter sees the pattern rather than a single snapshot.