Your dog was almost strangled he is acting normal now but his neck is now swollen where his collar had been what do you need to watch for now?

You should monitor your dog for any signs of discomfort, pain, or difficulty breathing, as swelling can indicate potential injury or inflammation. Keep an eye on the area for any changes in size, color, or temperature, and check for any discharge that could suggest infection. If the swelling does not improve, worsens, or if your dog shows any unusual behavior, such as lethargy or loss of appetite, consult a veterinarian promptly.