Stringhalt to three years. Horses may be affected so severely that euthanasia is necessary. It is unknown how long it takes for clinical signs to develop after the exposure to the cause of the condition. The majority of horses affected by stringhalt are dependent upon pasture for nutrition. Removal of the horse from its original paddock containing low-quality pasture, weeds and native grasses, along with dietary control, was the most common and successful treatment. Lateral digital extensor tenectomy has also been used as a treatment by veterinarians with a success rate of just over 50%. Phenytoin has been used in the
Which? centres during the 1970s. More than 120 such centres were operating in 1977-8, many of them funded by local councils. The centres closed as funding was withdrawn by the government in 1980. "Which?" continued campaigning on consumer safety issues, with its car safety test results strengthening calls to legislate car manufacturers to fit seat belts in all new cars, helping to make it compulsory to Clunk Click Every Trip in 1983. In 1992, "Which?" launched another satellite publication, this one aimed at youngsters aged 11–15, called Check It Out!, but it failed to take off and closed in June 1994.