As per anne/clear's question above, spike also has a shared dog... though ein is of human intelligence he has no appable history, would he also apply as a regainable pet?

To further clarify: Ein is incapable of speech and I have no desire to augment his abilities to do so, and otherwise is a completely normal pet. He's described as "a data dog" whose capabilities are "top secret" and so the most he's capable of doing is understanding which buttons to press on a communicator (he cannot type because of his paws) and comprehending human speech despite being unable to respond to it in ways most humans understand.