Yeti has good advice but you can do the same thing if you heat the head of a straight pin- red hot and touch the tick on it's butt. This should cause it to back out of your dog. You can also try to cover the ticks with alcohol using a Q-Tip. This should also get them to back out. You want to try to avoid breaking the head off of the tick as this can cause it's head to cause infection. If you try to pull it off with tweezers, this will probably happen so be careful about doing that. There are also sprays to get that will make them release, that you should be able to get at the grocery store. Good luck.