Has he been to the vet for a check recently? He is a senior now and could have some arthritis issues or something else going on. The hot and humid weather makes my seniors a bit sore.
If you are interested, there is a site that is a bit busier than this one:
http://www.abeagleworld.com/forums/ubbthreads.php/forum_summary
If you are interested, there is a site that is a bit busier than this one:
http://www.abeagleworld.com/forums/ubbthreads.php/forum_summary