If it is the purpose of the injection to soften hardened fecal masses, the water should be comfortably warm and may have a little clean soap in it.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
In view of the nearly undamaged condition of many of the bones recovered from the fissures, it is reasonable to expect that fecal material would be preserved.
"Two New Pelycosaurs from the Lower Permian of Oklahoma"
Richard C. Fox
Where the fecal process however is sluggish, the improvement resulting from the baths is very striking.
"The Electric Bath"
George M. Schweig