I actually think the Cats (ISFP) are even worse. All the same faults but they manipulate outside of the relationship for the downfall of the INTP. The Mouse (ISFJ) is not rational and devious enough (although a Guardian with allies) to cause a problem if the INTP is sussed on the problem. Cats are not rational but are self-serving by type, which makes them even more of a nuisance. Cats will lie and deceive by nature.