If animals were stones with no feelings, innate things, then there is nothing to discuss. They are sentient beings. Their emotions do come into it.
And what emotion might that be?
How exactly are we to know what goes on in the head of some animal?
Behavior doesn’t cut it, because they can readily learn responses.
We can’t say an animal feels fear because it runs when we try to bludgeon it with a hammer. It may feel fear, it may not. We have no way to tell. The running may simply be a response to the stimuli and an unwillingness to sit there while it is beaten.
Likewise love. Most especially love. How are we to tell in some creature how it knows love? Most teenagers of the human variety cannot sort this one out among themselves yet we would ascribe the feelings to animals?
How about anger? I admit I have seen animals act like they could be angry.
But then I can throw some food in their direction and suddenly the acting is gone. Perhaps there was no anger at all…
Joy? Same as my experience with anger. Throw some food and the display is gone.
Short of a talking animal that can tell me what they are feeling, I am going to stick with my position that emotions in animals cannot be judged with any degree of certainty.
With regard to your earlier post, have you never kept a pet or observed an animal?
Actually, I have for most of my life.
I have had chickens, snakes, dogs, cats, rabbits.
In all of them, I do not believe anyone could say with any degree of certainty if there are emotions at all. Their behavior is learned.