How SOLID works

A four-step wizard. Live results on every screen. Built so you can ration a herd between milkings — on a phone, with muddy hands.

1. Set up your herd
Name the herd, pick the breed (Black & White, Jersey…), enter average cows in milk, body weight, target yield, current litres and milk price. Takes 20 seconds.
2. Pick your forages
Tick the silages, grazed grass, fodder beet or whole crop you're feeding. Use the +/- steppers to dial in kg per cow per day. Add your own custom forages too.
3. Add concentrates
Same again for Barley, Soya, Maize, Lupins and the rest. Edit £/tonne to match what you're paying this month — your margin updates live.
4. See the results
Five status pills (Total DMI, MJ/kg DM, CP%, DM%, Litres) turn green when you're in the target range. Cost/Litre, Margin/Litre and Margin/Cow show what the ration delivers per day.

What the 5 measures mean

Total DMI

Total dry matter your cows eat each day. Drives intake-based yield potential. Target ~18–26 kg.

MJ/kg DM

Energy density of the ration. Too low and yield drops; too high and cows over-condition. Target 10.5–11.5.

CP%

Crude protein as a share of dry matter. Target 15–18% for milking cows.

DM%

Dry matter as a share of the ration as fed (including water). Target 20–38%.

Litres

Estimated litres your ration can support per cow per day. Compare with your actual yield.