Poor Sandy. 🙁 I am new to bunnies this past year ;hopefully someone with more experience will answer. Given what I’ve read about introducing bunnies and trying to bond them, I think the experience can sometimes be stressful, so I would not rush this if it were me.
I am currently dealing with GI Stasis in my Honey (since Saturday afternoon), so I know how difficult, stressful, and consuming it is to keep a bunny eating. I would keep giving her time and love. What are you feeding her? Does something like canned pumpkin (plain pumpkin–not the spiced/sweetened pumpkin pie filling) entice her? What about trying different types of hay? Honey is taking to the Oxbow Botanical blend better than her “plain” timothy or oat. ( http://www.oxbowanimalhealth.com/products/type/detail?object=1620 ) You may already be doing all of this–just trying to think about what I’ve read and what I’ve been doing with Honey’s stasis.
Do you think Sandy’s depression has led to stasis? If so, she may also be dealing with gas pain and you may want to address that. If her fecals are normal size and amount, this is probably not an issue.
It’s so hard to see our pets grieving and/or sick. 🙁 I’m sure it’s hard on you, too, having lost Dude. Hang in there.