With proper care he should also take care of and rear up all domestic animals as a father looking after his sons. Anything else that he will do, will be considered as improper for him.
तद् भवेदन्यत् कर्म पितृवत् पालयेद् वैश्यो युक्तः सर्वान् पशूनिह। विकर्म यत् स समाचरेत्॥