Effect of acids in feed on pH in mink urine

Diseases in the urinary tract/bladder tones is observed in a large number of dead mink kits in June/July. To reduce the risk of urinary stones, the pH in the urine ought to be between 6.0 and 6.6.
To evaluate the effect on urine-pH by adding acids to the feed, a screening with difference acids/acidifiers in different levels has been performed.