i need some training advice.
i have a 2+ year old yellow lab who, up until a few weeks ago, loved to retrieve the canvas duck dummy i throw for him. it seems now he does not like the fact the canvas duck dummy gets cold, wet, and snowy after a couple throws. as of today he will not even go after the dummy. today i threw the dummy and my dog would not even "go" to get it. instead i had to walk him to it, place it in his mouth (with a 'hold' command), then he will hold it, heel to me, walk back with me to where i was standing when i threw it, and drop it on command.
after refusing to retrieve the dummy, he will happily retrieve a tennis ball.
any tips for what i need to do to get him to again retrieve the canvas duck dummy in spite of it being cold, wet, and snowy?