Hello & welcome, I am Dr. B, a licensed veterinarian and I would like to help you with your wee one today.
How long has Oscar had these signs?
Is he limping or dragging a leg?
Are there are swellings on the leg, foot, or in the webbing?
If you can handle him, any areas of discomfort when you press anywhere on the leg?
When you flex or extend the joints?
Any bone instability or crunching?
Can you take a photo of this puncture to let me see what you are seeing? To post a photo, you can use the paper clip button on the tool bar above the text box. Or if you cannot see that on your phone/computer, then you can post them on any site (ie Flickr, Photobucket, Imgr etc) and paste the web link here for me to have a peek.