The Late Triassic in present day England was humid, warm, and partially submerged, which created 1000s of little islands and shallow lagoons packed with delicious fishes. This also gave evolution some nice conditions for trying out new body designs. Pendraigs followed the path of insular dwarfism since space was limited and there were no large predators to compete with. So yes, they would have been cute to hang out with, but still packed a toothy bite if you got too close.

I personally enjoy my own compactness when I'm on long flights...