Thanks for the information...
I do believe that your guy has an infection of some form but it is hard to tell where this is coming from. This may be an infection causing this limping.
It is a good sign that there is no digestive disturbance. For now, give your guy aspirin at 5 mg per pound every 12 hr. ONLY AND ONLY
if you can get him to eat something. This will reduce any fever from this infection so his body can fight this off., if he has a discharge from his eyes
, purchase Artificial tears at the pharmacy and apply a few drops every 6 hrs to flush out his eyes.
If there is still an obvious lesion on his paw, apply hot compresses every 4 hrs to help draw an infection to the outside...if there is no improvement after this, have your vet check your guy since we may have missed something.
Does that make sense to you?
Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please REPLY so I can clarify for you.
Sincerely, XXXXX XXXXX