My 2 month old kitten, Ven passed away this morning :(

When my dog died I didn't feel this lost empty feeling, I guess at some point I knew my dog is going to died soon if not in the next few years as he was 10 years old. But this kitten was bearly 1 month old when Byen found him, and now he's gone I we're still not sure what was the cause.

:( I want him back!!