Neighborhood cat came over to visit. Not sure if I should install a chip-door or something?

What about it?

First off, I adore cats, and everywhere I go they seem to find me. However I have two of my own and lately some cats are trying to get into my house 😅 Last night I heard the cat door and said ‘hi’ anticipating one of mine to reply back. When I don’t hear either I went to go look to see what was up, and was met with a confused look from an (you guessed it) orange cat, who is not mine. He or she looked at me, I back and then it carefully jumped back out 😹 So do I install a cat door that is chip activated? Do I see if there is a way for this cat to get along with mine? Photo added for cat tax - AI generated

He's looking for a date.

We’re babysitting her for a week. Also, we already have an other cat. Any advice?

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