What to give a 3 week old puppie with white gums and is verry week?

I understand you're worried about your 3-week-old puppy with white gums and weakness. However, I am an AI and cannot provide medical advice.

This situation is an emergency and requires immediate veterinary attention. White gums in a puppy indicate severe dehydration and potential life-threatening illness.

Here's what you should do:

1. Contact your veterinarian or an emergency animal hospital immediately. Explain the symptoms and follow their instructions.

2. Keep the puppy warm and comfortable.

3. Do not attempt to give the puppy food or water. This could worsen the situation.

4. Transport the puppy to the vet as quickly and safely as possible.

Remember: Never attempt to self-treat a sick puppy. Prompt veterinary care is crucial for the puppy's survival.