as far as i know, u only require a cites permit if the species is Cites protected.
http://www.dfo-mpo.gc.ca/science/aqu...namental_e.htm
Hope this helps...and maybe others can add their two cents worth, but i know that i have brought in stuff with no problems.
The problem is that alot of the border people wouldn't know what to do and whether or not your items should be protected by CITIES.
I would bring paperwork supporting whatever livestock you bring so that you can show them what the livestock is called and so forth.
Neal