My 10 1/2 yr old chocolate lab is having a tougher time handling the cold, it was -15f this morning on the river and his feet started bothering him when he would get out of the water and walk through the snow. He also showed a hint of reluctance after about 10 retrieves so we called it quits after a dozen. He had a vest and was sitting on another vest and decoy bag with my heavy coat over him between retrieves. We were out for an hour and a half which was probably a half hour too long to be honest. The joyful enthusiasm that we started with was soon turned into a wore out dog. This wouldn't have happened two years ago, so I know father time has caught up, but what can I do to make his hunts more enjoyable and less brutal? He gets really sore that night and I hate seeing him like that. I know a few small streams that hold mallards, and those turn into short land retrieves, maybe some neoprene booties and short hunts? The weather might not warm up for the rest of the season and he would rather die trying vs. Sit at home.