The first thing is to give bath. This is complicated but there is a really wonderful Doc - Sherry Rogers MD that is in environmental medicine - treating people who are exposed to chemicals (as we all are on a daily basis) that cause depression, cancer, heart disease, etc. She has writen many books but dhe has one titled "Detoxify or Die" with all types of treatments to detoxify our bodies. I see no reason that this whould not work for our pets. The website is www.prestigepublishing.com
On the other hand maybe this one time did not do any damage and you dog can detoxify on his or her own.
Wheither we develop disease or have no effect from our exposures is totally do if we can detoxify or not.
Robert D. Bard