Here's what you should do:
1. Assess the situation:
* Ear Injury: Carefully examine the bunny with the ear injury. Is it just a small tear or is there a larger portion missing? Is there any bleeding?
* Coldness: Feel the bunny's body. Is it significantly colder than the other bunny? Does it seem sluggish or unresponsive?
2. Seek Veterinary Help Immediately:
* For the ear injury: You'll need to see a veterinarian ASAP. An injured ear can be prone to infection, and they may need stitches or other treatment.
* For the cold bunny: This could be a sign of hypothermia, which is very dangerous in young animals. A vet can assess the bunny's temperature and provide appropriate care.
3. While Waiting for the Vet:
* Keep the bunnies warm: Provide a warm, safe space for the babies. A heat pad set on low, or a warm water bottle wrapped in a towel can help.
* Keep them hydrated: If the bunnies are nursing, make sure the mother rabbit is healthy and has access to plenty of water. You can also try offering a small amount of warmed water with a dropper.
Important Considerations:
* Mother Rabbit's Behavior: Observe the mother rabbit closely. Is she attentive to both babies? Is she nursing them normally? Any changes in her behavior could indicate a problem with the babies or with her own health.
* Environmental Factors: Make sure the bunnies' nesting area is clean, dry, and free of drafts.
Remember: I am an AI assistant and cannot provide medical advice. It's critical to seek professional veterinary help immediately. They will be able to diagnose the problems and provide the best possible care for your bunnies.