(From the free Griffon's Saddlebag's "Griffons of the Multiverse" supplement)
Pseudogriffons are intelligent, cat-sized griffons that serve many-a Wizard as a familiar. Some say that they were originally created by a griffon-loving wizard as an answer to Pseudodragons, explaining many of their traits, such as their intelligence, which is on a level that can be described as sapient, even though they aren't able to speak. However, they are able to telepathically let other creatures know what they are feeling. Similarly to Pseudodragons, Pseudogriffons also often enjoy being pampered, given cute things to wear, and don't mind being treated like cute pets, even with their intelligence; just treat them right, and you have a friend for life.