Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to train a rottweiler [title] Learn about the breed. [step] Any person who owns a rottweiler should have a good basic knowledge about the breed. Not only will this help you train your rottweiler properly, but also keep it happy and healthy.

Ending1: [substeps] Rottweilers typically are greyhaired and have coloration similar to other dogs, like a white type of dog, brown or brown. These breeds are generally always smaller than other breeds and tend to be slightly older. Ending2: [substeps] Well-bred rottweilers are large and athletic. Male rottweilers can grow up to 27 inches tall at the shoulder and weigh 100-135 pounds. Ending3: [substeps] Rottweilers are not bred for hunting. The entire dog population cannot be bred for hunting, but a purebred rottweiler proves to be a capable dog and combines many of the same characteristics and techniques. Ending4: Making your dog happy and healthy will allow you to bond with it and make him company. [substeps] The breed is composed of two different breeds: the wild kind and the feral breed.

Answer format: ending1/ending2/ending3/ending4