Exactly. All of that is reasonable and the behavior described are obviously present as anyone who's ever had a dog would tell. So I don't understand why "are animals conscious" is being debated at this point.
I’m not saying that this is the case, but all the mentioned behaviors are only indicators and could also be reflexive actions which the dog is genetically programmed to do because they work. If a beetle is flipped, it also has a “program” to get upright again, but that doesn’t mean it’s aware of its situation and is actively deciding something. I’m pretty sure dogs are conscious, but you can’t really tell from the outside. LLMs also appear to reason and make arguments but I wouldn’t call them conscious.
You’re right, you also can’t tell for other people. You can make an assumption because they are very similar to you and you yourself appear to be conscious to yourself. But you can’t really disprove solipsism as far as I know.