Brian,
try giving Omega 3 and 6 supplements daily and you can soak his feet in Epson salts in the bath for 10-20 minutes rather then give antibitootcs all the time.
Caladryl lotion or cortisone treatments can help as well a shome rmeedies rather than vet visits all the time.
Does he go in environements that are wet and dirty alot? if so, try to avoid and keep his feet dry and clean..this may help the constant reoccurences.
I respect your realized convictions and now you know where all the strife in the breed comes from..Breeding pure blues comes with potential problems and that is just the surface.
James