Do pigeons have to have fly space?

[stickman]

I have a pen that is 6 foot long by 3ft tall by 3 foot deep. One third of it is enclosed (for shelter). It stands 4 foot off the ground. I plan on getting one pair of pigeons to raise in the pen. I haven't planned on flying them. Will they be healthy and happy?

 

[Mary Of Exeter]

Yep, they'll still be happy and healthy