Thank you Dr. Kellon,
I will try the psyllium for the donkey. She is a mini donkey - should she get the whole 2 oz., or is it the same amount no matter what the size of equine? That's great that it can be added dry directly to wet beet pulp, seems like it will be much less messy than my old method! I usually put a few drops of peppermint extract in the water and that's been a hit.  
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Tucker and Indigo
NC, Nov 2018
https://ecir.groups.io/g/CaseHistory/files/Tucker%20and%20Indigo 
https://ecir.groups.io/g/CaseHistory/album?id=80036