Deer in greenhouse

A doe that comes and usually has here fawns on my property has learned how to open my barn style greenhouse door. My dog opens the door when I'm inside, so I imagine that she is mimicking the dog. The fawns stand by and watch her, so next year they will probably open the door too.  Never thought I'd have to create a latch to keep deer out.

There is a doe here that has had twins for at least three years in a row.  Want to trade?

Peace

Oooh, nice! If the balloon goes up, you have solved the problem of complete protein requirements from the greenhouse. Without lifting a finger!

Adding a latch that is fool proof sounds easy to me.

Something like this:

https://www.amazon.com/Qwikee-Latch-Livestock-Extra-Protection/dp/B007OUGERC/ref=asc_df_B007OUGERC/