This is not what the people who say the word AI right now are doing at all. But let's consider a one-to-one physics based simulation of the brain of a cat.

It couldn't run in real time like a living cat. It would be very slow, but you could give it reasonable inputs and get responses similar to how a cat might react (the only reason not to do a human mind is size, this is going to take so much computing to do very little)

Is it conscious like a cat?

I lean on a hard YES.