Rambutan — Food safety facts
Feed with care · Dogs · full breakdown on the linked food page
Flesh only and only a little. The seed is toxic and the spiky skin is a choking risk.
Short answer
No, give rambutan to a pregnant dog only with extreme caution. The edible flesh is low‑risk, but you must remove the spiky skin and the seed, which are choking hazards and toxic. Offer just a tiny bite of fresh flesh and observe for vomiting or diarrhea. If any gastrointestinal upset occurs, contact your veterinarian promptly.