There is a syndrome called Feline Hyperesthesia, which is poorly understood but has been observed to involve sensory hallucinations for cats. So yes, they can.
The Pathophysiology of hallucinations are such that it would be reasonable to assume that anything with a brain might experience false sensory stimuli, be it visual or otherwise.
After I took my medication, i had started to hallucinate.
Yes, it is known that melatonin can make you hallucinate.
mediation or a head injuryPeople have used isolation tanks to hallucinate.
It doesn't have any psychoactive chemicals, so therefore it does not make you hallucinate.
no.. it does not
Probably.
It isn't really hallucinating. Cats don't see well in light. Shadows can confuse them. A slight disturbance such as a fleck of lint in the air, can either mesmerize or freak them out. If you notice a cat staring at one place, it's often trying to figure out what it is seeing.
It's not the same for every person. You could basically hallucinate about anything.
perceive what is not there; have illusions
Reality.
yes.
Nope