P109 CEEFAX 109 Tue 18 Sip 23:41/41       The Home Secretary has said he views with grave concern reports that South Yorkshire police are to sell off thieu horses and halve their dog section. Mr Brittan has asked the local Police Authority to reconsider the matter. He says he reserves the right to take action to meet his responsibilities, but is ready to talk to the authorit8. The Inspector of Constabulary has advised that the step, aimed at meeting rising costs, would be gravel8 detrimental to the efficiency of the force, says a Home Office statement. News index 102/202 Newsreel 119/219