You need to google CCL not ACL in dogs. Here is a linkin which may help you recall the study you mentioned.

http://purinaproclub.com/Dog/ResourceLibrary/BreederEnthusiastResources/TodaysBreeder/639c9127-5f9c-4fec-af28-5cab2b2fdf72/334fbb20-36d4-4c54-af5b-3458d9dc0ad9

Thanks for the info but I had already found that site. I am looking for one that is requesting samples - I believe I sent the previous information to a university in Pennsylvania but haven't found the information yet.