It is possible but not recommended. Both rice and dog food are staple foods, and the nutrition is not comprehensive. If you want your dog to eat rice, you can mix it with vegetables with less salt. If you want dog food, you can mix it with canned food and meat. At the same time, this can provide comprehensive nutrition and the dog will like to eat it more. In addition, it is recommended that domestic dogs mainly eat dog food, because the gastrointestinal tract of dogs is different from that of humans, and eating human food for a long time will cause a burden on the gastrointestinal tract.