It probably can't actually get into the hutch unless there is a hole/gap in the wire front or something, or if the catch on the door is loose.
However the fox doesn't actually need to get into the hutch to harm the rabbit, just the fact that the rabbit can see or smell (or even hear) the fox could cause it to become frightened or shocked. Rabbits can actually die from fright so be very careful to make sure the hutch is in an area where a fox can't access it. If you really care about keeping the rabbit from harm you could consider keeping your rabbit indoors, if not as a permanent "house rabbit" then you could at least keep it inside overnight.
It is possible, but not a good idea. Inbreeding can cause serious health problems for the offspring.
No, it would not be genetically possible.
A dwarf rabbit is a breed of rabbit that is very small. Some popular breeds are: The Netherland Dwarf, Polish, and Dwarf Hotot
they should be somehwhere between 6 months (or when the rabbit stops growing), but if you want to breed the rabbit fro meat and fur you can breed them earlier. Breeding to early will stunt growth.
The relationship of predator(fox) and prey(rabbit)
a rabbit is typically eaten by a fox...sad...
It is possible for any species to breed to any other species. whether or not conception happens is a whole other question. so yes a pine marten can breed with a fox, no offspring will be produced. just like a human could breed with a lowland gorilla, no offspring will be produced.
Long earred rabbit is not a rabbit breed, The breed with the long ears are Lops, There is mini lops, holland lops, french lops, English lops
Sumatran rabbit
a mexican rabbit
Silver Fox Rabbits can be a meat rabbit. Any big rabbit is good for meat. A good meat rabbit is California rabbits.
You can breed any rabbit if it is a rabbit and it is the right age to breed.