Jinger Duggar's breastfeeding journey with her baby boy, Finn, may come to an end sooner than she expected. The Counting On alum, 31, revealed why she's debating switching Finn to formula at 5 months old during the Wednesday, August 27, episode of her and husband Jeremy Vuolo's eponymous podcast. "I was just at the pediatrician with Finn, getting his little checkup.