You reach a drain cover and your dog stops. The metal looks ordinary to you, but the surface may feel unstable, sound hollow, or show gaps under their feet. Do not drag them over it. Step around if the path allows, or turn back to a safer route.
If your dog suddenly avoids many surfaces, slips, limps, or seems reluctant to move in other places, arrange a veterinary check. Pain, vision changes, and weakness can make footing harder, especially for an older dog. Check the grate itself for loose panels or gaps that could catch a paw.
Practice where the ground is safe
At home, offer a sturdy, non-slip surface with a slightly different texture. Let your dog investigate voluntarily and reward a sniff or one paw on it. End before they are worried. Over sessions, introduce other stable surfaces, always allowing them to step off. You do not need to train on an actual roadside grate while traffic passes.
When your dog is comfortable with new footing, approach a safe grate at a quiet time and reward looking at it or stepping near it. Give them the choice to go around. A dog who can calmly pass a grate without crossing it has still learned the route is manageable. If navigating it is unavoidable where you live, ask a qualified, reward-based trainer for a safe plan and consider whether another accessible route exists.
Sources: American Kennel Club: How to Teach Your Dog to Walk on Different Surfaces. Vetstreet: Training Your Dog to Walk on Slippery Floors.