Is it OK to burn rabbits for heat?

I saw this (I tried to post a GTrans but it wouldn’t stick) article in one of the two major Swedish newspapers.

The rabbit population, within the city of Stockholm, is being controlled (i.e. shot) annually. Usually, I presume, the shot rabbits would be cremated but now they are cremated in a boiler station, generating heat for the frozen Swedes. Assuming, for the sake of this argument, that they were shot anyway and not removed by alternative means. Does that make a difference? The rabbits are dead anyway. Isn’t it a waste to throw them away? Is it better that they, as it where, put something back into society that helped feed them (and then shot them of course)? Is it wrong?

Somehow it feels wrong and right at the same time. Your thoughts?