Thanks for your question!
Can you tell where the smell is coming from? Nails? underneath the paw?
Will he put any weight on it at all?
Is the skin discoloured between the toes at all?
Is he licking at it?
OK, thanks for that info.
If you are noticing a bad odour there has to be some type of infection present. It's possible that there is a foreign object stuck in his foot or he could have an infected wound.
An infection like this will likely not get better without oral antibiotics prescribed by your vet.
He may have some temporary relief by soaking the foot in epsom salts.
I hope he does ok!
I hope this information helps! If you have more questions regarding this problem, just hit reply. If I am online I will respond right away. Otherwise I will respond as soon as I come online again. Or, if my answer is sufficient, then please hit accept. Thanks!
The above is given for information only. Although I am a licensed veterinarian, I cannot legally prescribe medicines or diagnose your pet's condition without performing a physical exam. If you have concerns about your pet I would highly advise contacting your regular veterinarian.