The difficulty is in comparison. Dogs and cats will be motivated by different things thus the form of any cognitive test will differ between species. This tends

The difficulty is in comparison. Dogs and cats will be motivated by different things thus the form of any cognitive test will differ between species. This tends to mean that you cannot directly compare mean scores between species. What this usually resorts to is a testing strategy in which you test for minimal competencies. This comes up in infant reaearch all the time. Can we set up a test in such a way so that we can show that infants remember X. Unfortunately, this rarely gives you information about how good they are at it, how able are they to do it when the context is not perfectly arranged to support that type of cognition, etc. So I suspect that cats and dogs both show some set of cognitive competencies, but how they actually compare in intellectual ability will be quite difficult to assess.