Yeah it can be, geese are great but man can they be demanding and obnoxious. Thankfully all I have to do for the one pen to baby proof it is make sure there's no gaps that the little buggers can slip through when they're itty bitty. Aka taking hardware cloth and running it all along the panels of the fence to make sure they can't get through. (Since I'm using chain link kennel pannels for my main fencing)
The other coop is gonna be a bit more work since there are literal holes in the floor and gaps between the wall panels that I need to fix up. (It's older and was the first time myself or my ex were attempting to build a chicken coop... where's that tony stark gif...)