His gut should have developed well enough to take stage 2 already, and it also prepares him to be ready for stage 3 or cow’s milk later on. I would finish up my last tin of stage 1, then go on to stage 2:)
Nutritional wise, step 1 is not enough for your baby anymore. Should change as indicated by the FM.
Its up to u really. For us we changed because slightly cheaper lol
U can finish the remaining then switch to stage 2
NuraMarina Bozo