Can u use carefresh and shavings at the same time? (im new to this) and do they sell carefresh in canada?

Of course they sell Carefresh in Canada! I get mine at the local Pet Valu most often, I've seen it in Petland as well. The smaller bags are around 9.99$, the large bags I've seen for something like 27.99$. You can get something similar to Carefresh at Walmart as well, I'm not sure if they sell the actual brand though, as I haven't seen it in any of the ones around here (Winnipeg).