It's a honeymoon paddock.
I had two elephant man (one male, one female) retired adventurers in my fort. I used DFHack to change their sexual orientation, in the hopes that they might marry and have kids,
Berries and fruits should do the trick.
Orientation? What were they attracted to beforehand?
They were asexual. Apparently all retired adventurers are asexual. DFHack has a script that will make them hetero and interested. It can be used on any race on the map; dwarves, animals, etc.
I've been spending more time making sure they eat than I have trying to get them to breed at this point. They haven't been burrowed together in a small area for some time while I messed around with the grazing thing. I also need to check their ages to see if they're within ten years of one another, as that appears to also be a factor in whether or not a pair will get together. Like I said though, that took a bit of a back seat to my experimenting with setups that I could use to make sure that grass or cave moss is always available to animal people that might need to graze. Considering the FPS in this fort is a steady 25ish at the moment, nothing in it happens fast at all, LOL.
It's absolutely do-able, but for me, I'd just as soon stick to non grazing animal people for retired adventurer residents, haha. I was just checking out the elephant people initially to see how crazy OP the massive fellas really were. Which, btw, they are awesome. They're rather destructive as both an adventurer and as fort military, from what I've seen so far. However, they're slow. It seems like, at least in this fort that's been constantly retired/unretired, that animal people in particular have some pathing or speed issues. Maybe they're always moving around in stealth mode (since I usually have it turned on when I adventure). I don't know. They just don't move as fast as a dwarf or elf or human. They move a square or two, then pause and wait, then move a couple more, then pause and wait. It's weird. That behavior goes away if they're hauling something in their hand. They'll do the slow thing until they pick up an item they want to, say, store in a stockpile. As soon as they do, they move without pauses. As soon as they're done with the task, back to pausing.
Long story short, there's a couple bug reports here I need to make, I'd say.