Is it possible to call Dog?

When I started playing the game he was called Dogmeat but somehow his name got changed to Dog.

Now he's lost. I don't know where he is. Hope he didn't get killed.

How can I find Dog?

Is it possible to summon / call a companion?

No. And your names are strange because normally it's first called Dog which changes to Dogmeat after dialogue with mama Murphy in Concod.

If you are on PC, you can use console command (something like "move to") if you can get somewhere ID of him. Look at Wiki entry about Dogmeant.

Dogmeat can't die. Did you send him somewhere when you took on another companion? If you sent him to Sanctuary hills, look for him around a dog house.

If you didn't send him anywhere, look for him at the red rocket.

If you told him to wait, he's probably still there. I did that and forgot about him. Took me hours to locate him again.

He's most likely in a doghouse in your hometown

Yes, it is possible to summon Dogmeat [or any companion] with this simple mod.

http://www.nexusmods.com/fallout4/mods/1096

drop the texxt files in your Fallout4 folder and when in game, open the console and type without quotes "bat dogmeat"