There is a pet cat next door. I feel that the owner has gone out. I haven’t eaten for a few days. I just discovered that I want to feed it, but there must be cat food?

I do n’t have cat food. At 12 o’clock in the evening, what should I do, there is a salted duck egg that I ca n’t feed it, so I put some water, thinking about buying cat food tomorrow to eat, sigh