Children and dogs have one important thing in common on a walk: they will not tell you when something is going wrong. A child will keep trudging while getting quietly, dangerously cold. A dog will keep going straight past the point of injury or heatstroke, because staying with you outranks everything else in its head. In both cases the monitoring is your job, and asking is not the same as checking.

A walk with small children is a different activity

The mistake is bringing adult metrics along. Distance covered is not the measure of a good day out. Two miles that include a stream to dam, a fallen tree to climb and a proper puddle is an excellent walk. Six efficient miles is a march, and the child who did it will not want to come next time.

Start much shorter than you think and build over a season. Pace to the slowest member, expect to stop constantly, and put the destination somewhere achievable with something worth arriving at: a lake, a cairn, a cafe. Give a child a job, too. Holding the map, spotting the next marker, counting gates, being the one who decides when to stop for chocolate. A passenger gets bored much faster than a participant.

The single most useful habit is finishing while everyone is still having a good time. Turning for home twenty minutes early is how a child ends up asking to go again. Squeezing out the last mile until someone is in tears is how a family concludes that they are not outdoors people.

Keeping small people warm

  • Children lose heat faster than adults, because they carry more surface area for their body mass. The margin you are used to having simply is not there for them.
  • A child in a carrier is generating no heat at all while you are working hard. They need far more insulation than you do, including something over the legs and feet, which is where cold gets missed. Check hands, ears and feet every time you stop.
  • Check rather than ask. A cold child often says they are fine, either because they are absorbed in something or because they do not want the walk to end.
  • Carry a complete change of clothes, not just a spare layer. Children fall in streams. That is not a risk, it is a schedule.
  • The same applies in reverse in summer. Hats, sunscreen, shade at lunch, and more water than seems reasonable.
  • Keep them well away from edges and on the inside of any path with a drop. Children do not have adult judgment about exposure, and no amount of being told changes that.

Dogs are fitter than you think, and less durable

Fitness is built rather than assumed. A dog that walks half an hour a day is not conditioned for eight hours over rough ground, and because it will never opt out, the first sign of a problem is usually stiffness the following morning. Build distance over weeks the way you would for yourself.

Puppies are a special case. Long distances and repetitive impact while a young dog is still growing is a real concern, and how much is appropriate depends heavily on breed and age. Ask your vet what is reasonable for your specific dog rather than working from what the adult dog next door manages.

Heat is the thing that kills dogs on walks. They shed heat mainly by panting, which is far less effective than sweating, and flat-faced breeds are dramatically worse at it again. Heatstroke develops quickly and can be fatal. On warm days walk early or late, plan shade, carry water and something to drink it from, and stop long before your dog looks distressed. If one does overheat, get it into shade, wet the whole body rather than just the head, and get to a vet. And never, in any weather that could turn warm, leave a dog in a parked car.

  • Check paws. Hot rock and tarmac burn pads, sharp scree and coarse gritstone wear them down, and in winter ice balls form between the toes and road salt irritates. Rinse and inspect after a walk.
  • In warm weather, keep dogs out of still water carrying a green or blue-green scum. Blue-green algae is genuinely lethal to dogs and acts fast. Moving water is a safer bet, and a carried bottle safer still.
  • Check for ticks afterward, particularly around ears, armpits and groin, and check yourself while you are at it.
  • Bring what the dog needs, not just what you need: water, bowl, food, a towel for the car, a spare lead, and bags for waste that you actually carry out rather than hang on a branch.

Livestock, wildlife and other walkers

Around sheep, a dog goes on a lead. This is not a matter of how well behaved yours is; the consequences of getting it wrong fall on the farmer and on the animals, and in many places they fall legally on you. The same applies in ground-nesting bird season, when a dog running through rough grass does damage nobody sees.

Cattle are the reverse case, and the standard advice surprises people. If cattle approach or start moving toward you, let the dog off the lead. Cattle are reacting to the dog, and an unleashed dog can outrun them and will lead them away from you. A dog attached to your wrist means they follow both of you. Walk calmly to the field edge, do not turn your back on them, and give cows with calves a very wide berth or another route entirely.

If recall is unreliable, the lead stays on. Not everyone on the path likes dogs, some people are frightened of them, and a dog that ignores you near a crag edge or a road is one bad moment from a very bad day.

When to leave the dog at home

  • Hot days. There is no version of a big summer walk that is fair on a dog in the middle of the afternoon.
  • Anything with scrambling, ladder stiles, or steep steps where you would have to lift the dog up or down. If you cannot do it one-handed, it is not a route for them.
  • Long descents on scree and sharp rock, which do more damage to pads than the ascent ever does.
  • Anywhere with seasonal restrictions for lambing or nesting. These exist for a reason and are usually posted at the gate.
  • Remote routes with a dog too heavy to carry. Ask yourself honestly what happens if it cuts a pad five miles out. Mountain rescue teams do help in these situations, and it is better not to be the reason they are out.

None of this is an argument against bringing either of them. A child who learns that weather is interesting rather than a reason to stay in has been given something durable, and a dog on a hillside is unmatched company. It just means the plan belongs to the least capable member of the party, which on these days is not you.