Hi!
I also wrote the Canadian DAT on Nov. 2nd (this is the second time I've written the DAT) and here's what I used:
Biology and General Chemistry: I used Examcrackers (a series of books meant for the MCAT), the information is presented very clearly and each section is followed by questions with detailed answers in order for you to gauge your understanding a few topics at a time (which is nicer than finishing everything and finding out you really only understood half of everything)
Having said that about Examcrackers, you should be aware that it is lacking a few topics you need to know for the DAT (such as some basic plant science, ecology, and animal behaviour for the biology section and nuclear reactions for the chemistry section) --> for these topics I went to the Kaplan Blue Book (2009-2010 edition), I also went over Barron's DAT, but to be completely honest I think it's trash (luckily I didn't waste my money on it since it was a [sucky] gift) --> DO NOT base all of your studying on Kaplan's or Barron's, although I did very well on these sections the first time I took the DAT, many of the questions on the DAT I answered using prior knowledge (I have an undergraduate degree in biology and chemistry) and not from what I read in either of these books
Overall I definitely do not regret doing most of my studying (for my second DAT) using Examcrackers! (it sounds like I'm doing some advertising over here, but I'm being completely honest)
For the PAT: Crack DAT PAT. It was totally worth the investment (about $250 if I remember correctly). Although I have not received my scores yet (though I'm waiting anxiously), I felt as though this section went spectacularly well! It has 10 complete tests, each question has a detailed text and video explanation. It also has a seemingly infinite number of questions for angle ranking, hole punching, and cube counting. The level of difficulty with the actual DAT was very similar (except for angle ranking, which I found to be easier in the actual DAT, thankfully). You should keep in mind, however, that Crack the DAT PAT is a computerized version of the PAT, and the Canadian DAT still uses good old fashioned pencil and paper, so the "tic-tac-toe" strategy for hole-punching, for example, won't be of much use on the Canadian DAT unless you want to spend 15 minutes on that section (which you don't).
For the Reading Comprehension Test: I used both the passages provided by the practise booklet you can purchase from the CDA, the practise passage from the ADA, and IQ Publications: Reading Comprehension book (which has a total of 9 passages). You should be aware that the Canadian DAT RCT has a time limit of 50 minutes for this section (unlike the american section which has a limit of 60 minutes, I think), so practise under the proper timed conditions!
Anyway, that's the end of my essay! hahaha
I hope this was of some help and I wish you the best of luck!
Marcos