just less cow :-D

That is something that if I am not gravely mistaken red has said they will implement at some point. Not only for dangerous animals but for us who want to have more peaceful ones

For now you can use the console to spawn in some animals but if you are in survival mode be prepared to run instantly

the command is spawnnpc AnimaName and you type it in the console not the chat.

AnimalNames:
"bear"
"jaguar"
"tiger"
"polarbear"
"boar"
"snake"
"spider"
"spiderling"
"bearblack"