I'd think it would be likely.
Emotional attachment is a hard thing to deal with.
When those attachments are formed, regardless of whether it is another person, a pet, or good 'ol Bessie there chewing her cud for the third time, it is painful and difficult for those attachments to be severed, especially by death. Remember, cows weren't domesticated because of their being warm, cuddly, and amazing at catching frisbees. They were domesticated because they were a good source of meat. It was a pragmatic development on the part of Thog or whatever that ancient person was named to make getting food for his family that much easier. Humans have a tendency to deal out hurt rather than accept it.