My two Rottweilers male 7yrs and female 1 1/2 yrs are staying up all night and sleeping heavey all day.They pant alot even though they have fresh water everyday,they are jumpy and seem to be weery.They bark sometimes at night, not much! I am starting to think that there may be a coyote coming close to there fenced in yard at night,there has sightings of coyotes near homebut we've never seen one ourselves.What signs would I need to look for if my dogs are being harrassed by another animal?Can my Rots protect themselves from a coyote being that there both dogs. What elso could cause my dogs to act so strange?My female has gas all the time now(no change in food) like she's nervous,my male always acting like he is on guard.HELP