If your pregnant rabbit suddenly pants a lot and is lying down what does it mean?

If a pregnant rabbit is panting heavily and lying down, it could indicate that she is experiencing heat stress or discomfort, possibly due to the stress of pregnancy or an environmental factor. It may also suggest that she is in labor, especially if she is showing signs of nesting behavior or agitation. It's crucial to monitor her closely and ensure she is in a cool, quiet environment. If her condition doesn't improve or worsens, it’s advisable to consult a veterinarian.