Dog walkers who did not pick up after their pets have cost a New Forest farmer 18 of the 38 calves his herd was carrying. Tom Gould is a commoner, keeping cattle on the Forest under rights first written down 800 years ago. He scanned 38 cows in calf in March, turned them out onto Wilverley and Longslade for the summer, and when they came back in only half of them calved. Blood tests found every animal in the herd had been exposed to Neospora caninum. Some of the calves that did come were deformed. Neospora lives in a dog. It comes out in the faeces, sits in the grass, and gets eaten by a cow up to 6 months later. No vaccine exists and no treatment. An infected cow is infected for life, and she passes it down the female line to her heifer calves, so the loss runs past one year's calves and into the bloodline. Gould could not buy his way out either: New Forest stock has to be double tested for TB before it comes in, so a replacement heifer takes a season to get through the gate. The New Forest Dog Owners Group, 1,200 members, said it was the foxes. The Moredun Institute, which has been studying the parasite for 30 years, says the dog is the definitive host and it has found no link with foxes. The dog that carries it usually shows nothing. The owner who left it in the grass will never know he did, and he will walk the same path next Saturday with the same dog and the same bag in his pocket. That is the quiet half of the damage. Farm animals worth £1.95 million were injured or killed by dogs in Britain in 2025, up 10% on the year. NFU Mutual asked 1,407 dog owners about it in February. 57% let the dog off the lead in the countryside. 1 in 10 said it has no recall at all. 44% said it comes back some of the time. 72% do nothing to stop it chasing. Nearly two-thirds do not believe it could harm an animal. The law moved in March. Unlimited fines in place of the £1,000 cap that had stood since 1953, and the police can now swab a dog, seize it, and come through your door to do it. Not one person in any of this set out to hurt an animal, and 18 calves are dead anyway. Pick the mess up and put the lead on. It is the only request in British farming that costs nothing.