This liquid is supposed to replace the natural fluid in the joints that is lost sometimes. It is definitely easier than giving injections like I had to do before. I use it on my dog and will be trying it on my sister's horse soon.
My mare had what looked like 'spring-loaded stifles' and watching her move was as painful to me as it was to her. Since she's been on Lubri-Syn she is far more fluid and looks more comfortable moving. It worked so well on her I started feeding it to my OTTB just in case!