in my experience in raising rabbits I have had two that died from having their food switched. Keep him on his regular food and provide plenty of hay to help his digestion. If he doesn't pick his weight back up bring him to the vet.
My black silver marten junior doe
Blue junior holland lop buck
My Siamese sable holland lop just senior buck
Choclate silver marten ND junior buck
REW senior ND buck
Black tort holland lop senior buck
Black holland lop just senior doe
Broken black junior holland lop buck
Choclate...