http://www.dogster.com/answers/question/i_have_a_7_year_old_male_american_staffordshire_we_frequent_an_off_leash_dog_park_today_was_our_firs-68648 I have a 7 year old male American staffordshire that we rescued 5 months ago. We frequent an off leash dog park with success. Today, with snow and 16 F, he was aggressive to several dogs and made some owners uncomfortable with his bark as he was near them. Why the change...he is usually a loving gentle 80 pound dog. en-us Copyright Dogster 2013 Sat, 25 May 2013 05:14:13 GMT Fri, May 24th 2013, 22:14 GMT http://blogs.law.harvard.edu/tech/rss Dogster.com dogsters@dogster.com dogsters@dogster.com