Short answer: Not strictly essential as a formal vow, but feeding others is highly virtuous in Jainism.

• Why it’s valued: Jainism emphasizes ahimsa (non-violence) and compassion for all living beings. Providing food to the hungry or to monks and ascetics is a practical expression of dana (generosity) and loving-kindness, which helps purify intention and reduce harm.
• Who should practice it: Both lay Jains and monastics engage with charity in different ways. Monks rely on alms (bhiksha) for sustenance, while laypeople are encouraged to give food, money, or time to those in need and to the Jain community.
• Is it required? The core vows (ahimsa, truth, non-stealing, chastity, non-attachment for householders; and the Mahavratas for ascetics) do not list “feeding others” as an obligatory vow. However, generosity and care for others are strongly encouraged as part of righteous conduct and spiritual practice.
• Practical guidance: Share as you can—offer meals to those who need them, support charitable activities, or contribute to feeding programs run by Jain sanghas or temples. Feeding animals or the hungry in a mindful, non-wasteful way fits the principle of ahimsa.

If you’d like, I can share exact Jain scriptures or their approved translations on dana and charitable action in the Digambara and Śvetāmbara traditions.