Yes, I have seen chokes changed a few times on a dove field, but very seldom. I shoot a Beretta 687 SPII Sporting 20 ga. for doves a good bit, and have been known to change one of the chokes in it shooting doves. I played with the chokes in Argentina on this gun, and soon decided I liked a IM/LM combination in it for doves ........
MOST of the time. Early season I like a bit more open first barrel, as the doves are less wary and you get a lot closer shots.
If I were limited to nothing but this one gun, with my box of extended Comp-N-Chokes, I could do well on anything I hunt, with the exception of, maybe, the "tall ones" over the cypresses. But, glad I ain't.
SRH