In warm weather leaving your dog in a car with the windows closed or barely open can be extremely dangerous. Rottweilers, with their black coats and short muzzles are more susceptible to heat stroke than many other breeds. Rottweiler puppies frequently adapt well to older dogs or cats in your home. However, older Rottweilers can be more difficult to integrate into a new home with other pets. Bringing in a new dog after your Rottweiler has been 'ruler of the roost' for awhile can also be a problem.
Males tend to be less tolerant of other males than they are of females.
Bitches may be intolerant of either sex. Rottweilers who are aggressive toward other dogs must be carefully watched when around other dogs. Neutering can lessen aggressive behavour toward other dogs without diminishing territorial protectiveness. Hip dysplasia is a hereditary, development disease in Rottweilers and most other large dog breeds. It often causes pain as the dog ages.