Hi,
I hardly see reason if the baby will get TRV. I recalled on this forum*, someone mentioned the same problem and unfortunately visa officer refused baby TRV, on ground of possibility of becoming PR later. Which, ofcourse, was the case.
As Leon mentioned, the best option in case, God Forbid, of TRV refusal, go back to Canada and sponsor your kid. This will sustain your PRship and you can sponsor your kid. Ofcourse you need to have a job for that.
As you are waiting for reply from CIC ministry, you can also call CIC call centre for TRP.
* I will paste the link for the similar case on few forums I am aware of about Immigration.
Wish you all the best and as its Ramadan time, best time that a prayer will be accepted by almighty.
Best Regards
Yasir Majid
Link2Canada.ca