other animals don't think like us - and while we are animals too, we are far more advanced that any other animal on our planet. we've had civilisation and have far different processing brains than other animals. we're far more advanced genetically, mostly thanks to evolution.
rabbits do not feel nor think the way we do. the only thing that they really feel is fear, and the only reason they feel that is because its vital for their flight or fight to kick in. otherwise, they probably would not feel it at all. other than that, they do not really "feel" like us. they can not think. they can not process information like us.
they can of course feel pain too. but this probably isn't in a emotional pain scenario, this is a physical pain response. I am not sure if rabbits have the ability to feel "emotional pain", and its not to the same extent as humans.
other animals are more advanced, dogs seem to feel happiness and love us. other animals just aren't (yet) capable of that.
animals do not think nor feel the way we do, emotionally we're probably the most advanced. animals do not have those emotions, they do not really have "free will" - following patterns mostly for breeding cycles or weather. they can not do things out of spite, despite what people believe.
in all honesty imho humanising animals is what often causes them to suffer. people won't spay/neuter their animals for "fears of how the animal feels". they will not to this or that as "what if the animal doesn't want it" or similar. they won't put a suffering animal to sleep because of "the pets feelings".
the reality is is that we are putting these human emotions onto animals that they do not feel. animals follow patterns, they do not have free will as we do.
animals don't (currently) tend to feel emotions that are necessary. they have what they need to survive, which is often the emotion fear & physical pain, and that is all they need. other emotions would cause them issues, such as needing more recourses for the energy expended on them.
the bottom line is is that animals don't have a conscious - not in the way humans do.
there's no way Jim could have been thinking "mummy doesn't even want to look at me" as he doesn't even have the brain capacity to think like that. these animals only know a few things: to pass on their genes and breed to ensure their species survival, fear to help stay out of danger, and physical pain to remind them not to do that thing again.
but also, as harsh as this is - it doesn't matter anymore. Jim is gone.
I have learned that beating yourself up really does nothing.
you can not change the past. I can not change the past.
I have spent so much time beating myself up over things - oh how I should have done that for Snoopy or this or what if that. but the reality is it doesn't matter. he is gone, dead. no amount of mentally torturing myself will change what happened or bring him back. the only thing I can do is learn from it and better how I cared for him.
I can remember him yes, I cry over him yes, I wish that things had been different, I do. but sitting here "what if I did something wrong" doesn't change anything. beating myself up and going over every scenario "what if I just did this oh I'm such an idiot" doesn't change it.
Snoopy is gone, Jims is gone. neither of us can change that.
mentally torturing yourself "I did it wrong!" or "what if he had thought this" (which he doesn't process the mental capacity to do) isn't helpful for you. you are only making yourself more miserable and upset. you are only puting things into your head and making yourself upset. you are only beating yourself up which doesn't change anything.
not to say it doesn't hurt, because it does. but what you are doing to yourself will not change anything.
the past is the past - to quote the Lion King "you got to put your behind in your past."
gentle hugs, and reminder to not beat yourself up x