I've never met a griffin before so unless you count "ruthlessly attacking and having injection sites in their skin" as something strange, then no. [That alone is strange enough.]

...somebody I met gave me some interesting information that might build up a solid theory to what happened to them though. It kinda ties into the idea of them being guinea pigs, too. I asked him to send it to my CereVice but I haven't had a chance to check it out and decrypt the data yet. [A pause.] That's the only thing about Cerealia. There's a ton of information out there and we don't really know who knows what.