Where is the "infection" at?
If it's his feet(which it sounds like it might be), have the groomer trim the hair between the toes and under the foot short. Epsom salt soaks three times a day and then apply tinactin or another athletes foot spray twice a day (will also treat a fungal infection) be sure he doesn't lick it off though. Still take him to the vet if you are able to, they will be able to.
If it's his ears, he should be checked by the vet, there are different causes of ear infections bacterial/fungal each using different treatments. If you really can't take him and he is a floppy eared dog (like a cocker spaniel) you can clean the ears once a day and using monistat twice a day (will help treat the fungal yeast infection). Make sure there isn't any extra hair in there trapping the infection in, your grommer can/should have plucked those hairs and shaved the inside of the ear flap.
GL hope he gets better soon
at 11:50 AM on Jul. 10, 2010