Every heifer in the current selection is represented by a coloured square, where the colour indicates the heifer's current fertility status. The horizontal axis is the age of the heifer so an animal's square moves to the right over time. Animals that are missing fertility targets are easy to identify. as their status, and hence colour, remains unchanged as their age increases.
The coloured vertical lines show the fertility standards for heifers as defined in Herd records... Fertility standards.
The animal represented by any coloured square can be identified by clicking the square with the mouse:
Clicking the animal ID in the list jumps to that animal's record. Alternatively, clicking the animal ID with the right mouse button gives the option to put the animal ID in the holding pen where it can be investigated in greater detail.