How can I make a text conversation keep going?

This girl and I talk a lot in person but through text, well either she doesn't like to or we both suck as it. For example I just sent her a photo of my cats staring at a bird in the window with the caption "thought you might recognize this", she's met my cats, and simply said "hey there kitty cats!"

Maybe it's a normal response and I just don't know how to continue and I need help. I haven't seen her since last week for what it's worth

How can I make a text conversation keep going?
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