Question: asking for the veterinary expert.
Answer:  naturally colocasia asculanta is toxic to animals causing burning & swelling in muzzle, mouth & severe irritatation in plarynx & larynxial muscle , defect inthe speech production ,--due to presence of calcium oxalate , but it can also be use as dietary supplement after cooked or after processing , the banana can also be incorporate in cattle ration when both[ colocasia& banana ] are processed , when concentrate ration is use coniniously to the dairy cows the dung material are generally semi -solid in nature , when such fibre containing feed are incorporate in definite amount [ the amount  is  very on age , lactating cow, bullock, heifer] the dung become solid in nature & cleaning  of shed willbe easier , resulting decrease managemental cost & feed volume / cow .