It will go away. It might take a week or two, but it will go away.
I remember the first time I felt "the lump". I was in tears imagining every terrible thing possible, thank goodness I had a wonderful vet!
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He is your friend, your partner, your defender, your dog. You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion. -- Author Unknown