Short answer: Yes, pasteurizing (boiling/heating) milk is generally considered acceptable in Jain practice, as long as it is done to prevent harm and hygiene rather than to cause suffering.

Key points:

• Core Jain principle: Ahimsa (non-violence) and minimizing harm to all living beings. Heating milk to kill germs is seen as reducing potential harm to humans without harming cows or other beings.
• Practical note: Many Jain households boil or pasteurize milk before drinking. This is done for hygiene and safety and is not viewed as killing animals.
• Tradition differences: Dairy practices vary by community. Some Digambar households may avoid dairy altogether, while most Shwetambar and many Digambar householders who do consume dairy follow standard hygienic preparation (e.g., boiling) without issue.
• If you follow a specific guru or community rule, align with their guidance.

If you’d like, I can look for a precise JainKnowledge.org page that discusses Jain dietary practices and dairy in more detail.