I'm getting a dog soon and need a dog trailer. I've never shopped for a trailer before and would appreciate some recommendations. I'm likely to have children in the next few years as well. Given the expense of trailers, it'd be great if I could pick up a child trailer that is dog compatible, some kind of removable seat setup. I have zero experience with trailers. Does what I'm picturing exist, or are dog and child trailers fundamentally different in layout?

If the above is not possible, please recommend a dog trailer. Thanks for your time.