Hi
As long as the Baby is included in your additional Family Information,She should be able to go with you,As a Back up You can apply for a TRV so that she can go with you regardless then fix her papers in Canada
The baby has to be included in the application, has to have the medical, they will not issue a TRV in 99% of the time, as the OP has known they had a child and should have updated their application.
PMM