What do you do if your dog is whimpering in a piched tone all day?

I don"t know what to do hes been whimpering!I let him outside to go to the bathroom!Then i let him play with other dogs!Now i am giving him attention and i am feeding him!Help!

    What do you do if your dog is whimpering in a piched tone all day?

    I don"t know what to do hes been whimpering!I let him outside to go to the bathroom!Then i let him play with other dogs!Now i am giving him attention and i am feeding him!Help!...
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