Yes, as a treat in small amounts, like aone or two teaspoons per day, I would say it's ok. Although imho it's one of those typical pet shop products that aren't healthy as they claim to be at all, lots of grains in it that pet rabbits do not need. They sure will love it though. One of the bigger health risk for rabbits is getting fat, which is easy to overlook. They evolved on a meager diet and stuff like this - with 50% alfalfa and/or grains is too rich to be a noticeable part of their diet.
More suited for hamsters, I guess.