Eyes Down. Some tips for early detection

I’ve been teaching farmers, vets and trimmers to mobility score cows for many years. When I first started doing it, I was worried I’d be “teaching Grandma to suck eggs”. However, the feedback has almost always been appreciative, so I no longer worry! People tell me time and again the training has helped them look at cows in a different way. The key word is “look”. Imagine you are a lion trying to pick out your prey – after all, that is the situation. Cows are prey animals, and they have adapted to mask pain. Man is a hunter, and has developed skills at reading the body language of animals. Mobility scoring is about re-honing those visual skills, and focusing on lameness rather than, say, bulling signs or how pretty the cow is.

The obvious lame cows, those that are slower than their herd mates, perhaps at the back of the herd, last coming into the parlour or holding a foot up, might be considered as the lion’s next dinner. They have lost their ability to mask the lameness. You don’t need to mobility score to find these cows. They are “dead meat”, or more correctly, Mobility Score 3 cows.

It is the next level down, the Score 2 cows, which mobility scoring is valuable for. They will walk at the same speed as their herd mates and are probably well hidden in the herd. These cows will benefit from treatment as soon as possible. Research (and common sense) tells us that if treatment is delayed they will have a lower chance of recovery and, if they should recover, a higher chance of becoming lame again. Often farmers treat (or put out for the trimmer) just the Score 3 cows. These may be the worst ones but by missing Score 2 cows they never get on top of their lameness problem. It is like treating mastitis only once the quarter has gone rock-solid and ruined rather than at an earlier stage when there is still hope of a cure. Not clever.

So how do farmers spot Score 2 cows? Here are some tips:

  1. Look. You really do need to focus on just mobility scoring. You won’t find them unless you look, and if you are doing other jobs too, such as milking, feeding or scraping muck, you are not properly looking.
  2. Be trained. Although a Score 2 lame cow will try and mask her lameness, there are “tells” which will give her away. You need to know and understand what these are. You also need to understand the AHDB Dairy four-point Mobility Score scale.
  3. Pay attention to walking speed, stride length, back position, head movement, tracking, walking rhythm and position of the fetlocks. That is seven things to look for, which is not easy when a group of cows are tumbling past you at speed.
  4. Watch the feet. Through experience of teaching mobility scoring, I reckon that a common reason for people missing lame cows (which I think are obvious) is because they are not looking at the feet. A back arch can be a valuable “tell”, but many lame cows will not show this. Watching foot placement is more valuable.
  5. Think where, when and who. Who is the best person to do the Mobility Scoring? It must be someone who is trained – and who has good eyesight! Think, when is the best time? Often it is at milking time as cows are coming out of the parlour. Think, where is the best place to stand? The cows should be easily identifiable, and need to be walking a few un-interrupted paces on level ground with good grip.

Mobility scoring helps farmers to alter the threshold at which they react to new lameness cases. It makes detection more sensitive, and allows farms to get ahead of the curve with their treatments. I encourage every dairy farmer to mobility score their herd at least once a fortnight. Some don’t see the point of it, or think they already spot their lame cows soon enough. This is a real shame because my own research and that of others shows that this simply isn’t true. These farmers are denying themselves the possibility of less lameness, more efficient use of their time (and their trimmer) and better profitability, as well as a happier herd.

Afterword: There is now a register of trained mobility scorers (ROMS) – see www.ROMS.org.uk. Becoming a registered scorer is a good way to demonstrate you have been trained in the AHDB Dairy Mobility Score system and that you update your skills regularly.[/vc_column_text][/vc_column][/vc_row]

Make sure foot trimming is targeting those cows which are most likely to benefit and most likely to recover quickly (i.e. the Score 2 cows).

Mobility Scoring the herd can be done as the cows return to the parlour as long as the walking surface is sound (not pasture, muddy or stony). Look at the feet placement. The back foot print should over-lie the front foot print almost perfectly – this is called “tracking”.

Foot shape and angle can be a useful “tell”. This cow has a very upright foot stance and a high heal because she is suffering from digital dermatitis. The fetlock will also be higher off the ground than the opposite side because she is bearing less weight on the lame foot.

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