This means that cats must eat meat to survive. Cats’ digestive systems aren’t good at processing fruits and vegetables. So, apple juice isn’t a part of cats’ natural diet.
One benefit from apple juice for cats are antioxidants. Still, antioxidants can also be found in many types of meat, like red meat. Considering this and the high sugar content – no, apple juice is not healthy for cats.
Not really; apple seed contains cyanide, and is toxic to cats. It is not very likely that your cat will ingest the whole apple and the seed, but, why risk it?