We feed once per day in the morning and fast our guys about once per week.
3-5x per week: 3 pounds of RMB for the 9 mo GSD (half a rack of ribs or half a largish frying chicken) and 1/2 pound for each Corgi.
1-2x per week 2 pounds liver, a pre-ground organ/tripe blend or muscle/organ blend for the GSD and 6oz for each Corgi
~2-3x per month something special to work on like trotters or beef gullet.
On the RMB days they get a random bit of green tripe (tennis ball size wad for the GSD, golf ball wad for the Corgwyn), raw egg (2 for the GSD), leftover meat from our meals, homemade pickles and/or a splash of cod liver oil.