you need to be careful about rabies   foxes can carry the virus  and if it
is acting strange and not in the normal behavior for a fox  it could be
infected   http://www.cdc.gov/ncidod/dvrd/kidsrabies/Animals/fox.htm

There is not more I can tell you other than I have heard of it before.  My
mother tells me her neighbors cat has been seen playing with a fox and they
dont harm each other, they are actually playfully frienly with each other.

As with the other post to this thread make sure your cat is vaccinated
against rabies.  If the fox appears to be disoriented or entranced and
doesn't run when you approach it and it growels at you there's a good chance
that the may have rabies, in that case keep yourself and your cat as far
away from it as possible and contact your local animal control or law
enforcement agency immediately.  Last thing you want is to be attacted by a
rabid animal and you dont want it around your pet either!

Hope this helps!

Doug
Newport, RI

There is not more I can tell you other than I have heard of it before.  My
mother tells me her neighbors cat has been seen playing with a fox and they
dont harm each other, they are actually playfully frienly with each other.

As with the other post to this thread make sure your cat is vaccinated
against rabies.  If the fox appears to be disoriented or entranced and
doesn't run when you approach it and it growels at you there's a good chance
that the may have rabies, in that case keep yourself and your cat as far
away from it as possible and contact your local animal control or law
enforcement agency immediately.  Last thing you want is to be attacted by a
rabid animal and you dont want it around your pet either!

Hope this helps!

Doug
Newport, RI