Good feeding and health are the important components for welfare assessment of migratory goats. But which components should be given more emphasis if you have to scored them out of 100 points?
Depending of possibility for measurements (if goats are wild, ... if I understood well):
You can try body condition scoring (BCS) on picture basis (direct indicator for level of nutrition and indirect for health), locomotion scoring (for health), face exams for intestinal parasites and quality of digestion of feed. You can try to make a welfare index. The correlations can be find ...for example, you can expect to find between intestinal worms and BCS, starch form faces and BSC and so on.