If his bonded buddy is gone, then yes, it’s possible he is depressed. Rabbits miss and mourn their buddies when they are gone.

Are your rabbits kept outside?

He probably is depressed. I hope you find the brother, keep looking. Knock on doors, ask to go in backyards, hopefully your vigilance will pay off.

In the meantime, I really recommend you keep Lionel inside and when and if you find his brother move him inside full as well. It’s just not safe outside.

I’m so sorry your rabbit got loose. :o(

I’m assuming they weren’t micro-chipped then? Sometimes when rabbits are under anesthesia for a spay/neuter, the vet will go ahead and micro-chip at that time. This isn’t always necessary, but it’s a good idea for rabbits who are outside sometimes, or for people who live in high-risk areas (earthquakes, hurricanes, floods, etc…) where they may get separated from their animals.

Hopefully, he is okay and he’ll find his way home, or someone will find him.

Have you posted on local Craigslists/kijiji sites? You could also put an ad in the newspaper and spread his picture around of Facebook. Someone might have him. Please don’t give up on him. *****Fingers crossed****

I’m sorry. I agree-post online and check the pound too, someone may recognize that he’s not a wild animal and bring him in.
I’m wondering about the dog walks to look for him-would he come to the dogs or be afraid? Perhaps go out on foot without the dogs and look.