I would say it isn't a cat track at all. A bobcat's track is wider than it is long. A cat has three lobes on the back of its heal pad and two at the front. The toes are more splayed in a cat track and the heal pad is more forward in relation to the toes.
The track in your pic is a K9. It looks like the left hind foot of a coyote. Notice the smaller heal pad impression and the larger toes on the left side, middle left toe being forward on the left side. The track is longer than it is wide and the toes are closer together. There is no large cresant shape between the toes and pad that a cat leaves.
As far as the rabbits being covered, that has me puzzlled. Usually a cat will cover with debris. A K9, especially a fox, will dig a small hole and bury it's uneaten kill.
Usually a K9 will try to dig in, but will scale a fence. A cat usually climbs, not digs.
With only one pic of a track it's hard to say for sure. Either way, good luck with your predator.
If you're interested I can show you a diagram on where to set a trap to catch a cat.
Chances are nil on catching an aduly wild K9 in a live trap.
Hope this was of some help.