lol bran mashes = bran plus whatever else you want to throw in there. How about a bran/alfalfa cube mash to balance the calcium/phosphorous? That's what my riding horses get in the winter.

Yes, the high calcium content in the alfalfa would balance the phos. in the bran - and as long as the alfalfa is fed in responable amounts to avoid excess protein, it would be the correct solution to the inverted values. Here is how you can figure out if you have an inverted value or not based on the fact that you need AT LEAST one part (more is better) calcium for each part phosphorus:

Convert the number of each feedstuff's weight from pounds to kilograms (Divide pounds by 2.2)

Multiple the numbers by the calcium / phos content of each feed. So say you are feeding 15.4lb of hay with .30% calcium and .19% phos. That would be 7kg x .30 = .021kg or 21 grams (.021 kg x 1000) and using the same formula the phos content in grams would be 13.3 grams.

21 grams calcium to 13.3 grams phos. = about 1.5 (21 divided by 13.3) Which is a suitable ratio - but you have to do that with everything they eat on a daily basis, so convert all their feed (hay, oats, bran, supplements, etc) into kg, multiple by the cal/phos % in each one and convert to grams - add all the grams of each to find the total amount (in grams) of calcium and phos. and then divide the total grams cal. by total grams phos. for your actual ratio.

Average amounts for common feedstuff:

Alfalfa 1.24 Cal / .22 Phos

Timothy .43 Cal / .20 Phos

Beet Pulp (Unsoaked) .62 Cal / .09 Phos

Wheat Bran .13 Cal / 1.13 Phos (Rice Bran is higher)

Oat Based Grain .05 Cal / .34 Phos