Can I let the dog lick her chicken?
Why do you want to let the dog lick her chicken?
Because my dog is pregnant, and she deserves all the food she wants.
If you are making food and want your dog to eat too, I think you should make sure that it's safe for animal consumption. Since she is pregnant you need to take extra precautions too.
The is no way chickens can harm a pregnant dog.
It's better to be safe than sorry, but if you want her to eat lots just make separate dog friendly chicken dishes for her.