Arthritis/prevention & control; Chromonar/pharmacology; Collagen/administration & dosage; Tyrosine/analogs & derivatives; Animals; Arthritis/chemically induced; Arthritis/pathology; Body Weight/drug effects; Cattle; Chromonar/analogs & derivatives; Cyclooxygenase 2; Disease Progression; Enzyme Activation/drug effects; Hindlimb/diagnostic imaging; Hindlimb/pathology; Interleukin-1/metabolism; Isoenzymes/drug effects; Isoenzymes/metabolism; Male; Malondialdehyde/metabolism; Nitric Oxide/blood; Poly(ADP-ribose) Polymerases/metabolism; Prostaglandin-Endoperoxide Synthases/drug effects; Prostaglandin-Endoperoxide Synthases/metabolism; Radiography; Rats; Rats, Inbred Lew; Severity of Illness Index; Time Factors; Tumor Necrosis Factor-alpha/metabolism; Tyrosine/drug effects; Tyrosine/metabolism