I didn't want to intrude on The Cat Coach thread but wanted to share something with you. I once had a cat with some of the same behaviors as your bengal and it turned out she was having seizures. Apparently this had been happening for a long time before I actually witnessed a seizure but her "not quite right" eyes wide staring and yowling were, according to my vet, due in part to her being disoriented from the seizures and feeling insecure because she didn't know what was happening to her & when it would happen again. Also, if your cat is middle aged, ask about the possibility of hyperthyroidism.