Electrolyte Sachets for Senior Dogs on Long Walks

Your vet's given you good advice there — older Labradors can struggle to regulate hydration on longer walks in a way younger dogs simply don't. A 10-year-old Lab's kidneys and cardiovascular system are working harder, so electrolyte support makes a real difference. How far are you typically walking, and does your dog show any signs of flagging — slowing down, panting heavily, seeming a bit dull towards the end?

That slowing down is worth taking seriously at his age — it can be tiredness, but it can also be early dehydration or electrolyte dip, especially on warmer days. Labs are also notorious for pushing on when they shouldn't because they want to please you. What's his build like — is he a lean working type or more of a stocky show-type Lab?

That's a useful detail — at 35kg he's carrying a fair amount of muscle and frame, which means he sweats and loses electrolytes more than a lighter dog would over 8 miles. For a dog in his situation, I'd recommend Pro-Kolin Protect sachets. They're made by Protexin, which is a well-regarded veterinary brand, and each sachet dissolves in water to provide sodium, potassium, and glucose — the right balance for rehydration rather than just plain water. You can mix one into his water at a midpoint break and again at the end of a long walk. They come in single-use sachets so they're easy to drop into a walking pack without any mess.

It's formulated specifically for dogs — human sports drinks like Lucozade or isotonic drinks have sugar levels and sometimes sweeteners like xylitol that are either unsuitable or outright dangerous for dogs. Pro-Kolin Protect is isotonic but calibrated for canine physiology, and it also contains kaolin which is gentle on the gut. That matters for older dogs whose digestion can be a bit more sensitive. It won't do him any harm on a walk where he's fine — it just supports recovery and keeps things balanced.

Yes, it's readily available on Amazon UK — search for Pro-Kolin Protect sachets and look for the Protexin-branded box, usually sold in packs of 30. At roughly 30–35p a sachet it's genuinely cheap insurance for a dog you're clearly looking after well. Worth keeping a couple in your walking kit and a few at home too.