My 185 lb miniature horse just did a 5 day horse paste trial. One click a day for 5 days. (Not one click but one 250lb mark)
It was feeling fine before I started the trial, just wanted to see what effect if any.
I can attest that my horse had no adverse reactions and appears to feel no difference from day one to day 5.
1/2" every week, sometimes every 2-3 since Dec 2020 for this horse of mine. No adverse effects here.