Assertion: obstacle's number | /r/CapableOf | break their toes[citation
Facets:
Source sentences:
text: Many sanctioning organizations prohibit that A-frames have low profile, narrow, horizontal slats all along their length to assist the dog's grip going up and down due to the number of dogs that have broken their toes[citation needed] on the slats; other organizations allow slats; and many organizations now allow or require a rubberized surface so the dog can ascend and descend easier.