Son goes on about wanting a snake (big thanks to his bud for putting THAT idea in his head) and I told him "Honey, it's just not a good idea to put a snake and a gerbil (pet he already has) in the same room." He understood that, still wants one, but understands he has to wait until Riley dies of old age, or he has his own place because I am not having a snake in the dining room.
This fella may do the same... snake in the house, chickens in a coop outside (in brooder in another room until then)... no way to know unless you ask. You could mention something like "if you don't already have one there are awesome coop ideas and info on brooding on BYC" and see what he says.. "Already have a coop/brooder" - awesome... "Ohhh we won't be needing a coop" -Not So Much
Or you could mention your spouse, brother, son loves wrestling and his all time favorite is Jake The Snake... that you didn't even realize it was a wrestler name... and if he goes on about wrestling, but not snakes, then okay... if he says I have five just like his... not so much.
There are ways of getting that info without being too obvious... Good Luck, that's a tough call!