Brief Answer:
No.

Detailed Answer:
Hello Mr XXXXX,

Thanks for the query.

I have gone through your query and understand your concern.

To answer your question clearly, no, there are no dietary restriction while getting the anti rabies vaccines for a dog bite.

Please complete the full course of vaccination, and don't believe the traditional vaidyas and such people.

Your wife should eat everything, there should be no dietary restrictions whatsoever.

I hope this answers your query, please feel free to write back to me if you have any doubts, otherwise you may close the discussion and rate my answer.

Wishing you and your wife good health.

Best regards

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