Canadian Brand. Royal Canin's Rottweiler is specially formulated for Rottweilers over 18 months old. In addition to fighting plaque and tartar, the tailored kibble design encourages the Rottweiler to slowly chew each kibble, decreasing the risk of gastric torsion. Predisposed to cardiac and joint issues, Royal Canin provides tailor-made nutrition for Rottweilers. EPA, DHA, taurine, and L-carnitine help promote a strong and healthy heart. Vitamins C and E, along with green tea extract and lycopene help to protect the heart cells, while increased protein and a moderate fat content promote optimal muscle tone.