It just seems that if the rabbits are excreting that much calcium in the urine that it is likely too much in the diet. I have been doing a lot of reading and can't remember where I read it, but it was on one of the university's websites that the alfalfa can cause kidney stones and other problems and shorten a rabbit's life. The protein in the alfalfa doesn't bother me and I figure that is why most of the manufacturers are basing their pellets on it and also that alfalfa isn't a bad source of vitamin A.
The rabbits were hubby's idea. I did get him to read parts of the forum last night. I don't think it would take much persuasion to get him to agree to feeding the rabbits grains instead of pellets. I just called the local feed mill and these are the following prices I got: whole oats $12.00, barley $16.50, wheat $12.00, and whole flax $32.00. The Manna Pro Pro there is 19.50 and I paid 15.49 at Rural King.