My mother has a little dog named Dolly (3/4 chihuahua). Dolly is about 14 years old and reasonably healthy, if turning a bit gray on the muzzle. She's spayed and never had puppies. She does not seem to be in the least arthritic, but she does have cataracts. She's been on a diet of high quality dry food all her life, and she has all her teeth. Very recently she's having what appears to be spells of confusion. For example, she'll be walking from one spot in the room to another, or from one room to another, and suddenly stop and act very disoriented, as though she forgot what she's doing or something. It's very hard to describe. She seems very confused for a few minutes, and then it clears up and she seems ok again for a while. This happens several times a day. It only started happening in the last few weeks. When my mother takes her outside, she does her usual "take off like a rocket after the nearest cat, barking her head off" routine. Other than those "spells", she seems her normal self, except she seems to tire more easily than usual. Could she be having some sort of seizures?