Photo Edit of 3 Cats

I'm wondering if you can please merge two photos together for me please?

I have two photos with 3 of our cats, photo 1 has two of them looking at the camera, and photo 2 has our third cat looking at the camera. I would like them both merged together with a smooth transition in the middle so it looks like one photo. Ideally I would like to print this later onto something as a Christmas gift for my fiancé.

Please get in touch if you think this is something you can do please, thank you!