Hello and welcome. My name is XXXXX XXXXX I am an experienced small animal veterinary surgeon, I will be very pleased to work with you today and will try my best to answer your question to your satisfaction.
If the foot and wing seem to be functioning OK and this is just a small flesh wound then this is very encouraging. That being the cases your main concern would be to prevent infection and make sure the wound heals.
You can do this by gently washing the wound in warm salt water twice a day. After washing dab it dry with some clean soft kitchen paper and apply a very thin smear of the likes of Savlon cream.
That should do the trick but of course in the unlikely event of the wound getting infected you should get a vet involved hands on as prescription drugs such as antibiotics may be required.
Finally keep Joey in a very quiet place away from the dog for a week or so because he will no doubt be a bit stressed at present.
That all sounds very encouraging thank you. I will follow your advice and if necessary get to a vets. I have moved Joey to a quiet room so he can recover hopefully fully.
He should be just fine ...