a book i can highly recomend is THE ULTIMATE GREYHOUND BY MARK SULLIVAN,the last chapter is an A-Z of common diseases and health problems.as a quick reference i go to this book,for some problems a photograph is shown,in short it tells you,common sites for the problem,signs,cause,and management.but still any doubts then to the vets.on amazon at the moment for £5.00+p&p(Used).