Moving the toe back to where it belongs NEVER hurts the horse. It may change mechanics in the foot enough to mobilize collections but as far as backing up the toe causing harm, no.  Review this file https://ecir.groups.io/g/main/files/Trimming/BACKING%20UP%20THE%20TOE.pdf .
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Eleanor in PA

www.drkellon.com 
EC Owner 2001
The first step to wisdom is "I don't know."