Lost Dog Reward - Sheltie resembles mini Lassie or Collie

We lost our family dog Linus on the 4th of July. He took off running when a loud firecracker went off. He was seen running towards Newington Forest Avenue from Hickory Ridge Court. He is a sable Shetland Sheepdog also known as a sheltie. He resembles a Collie (Lassie) but is smaller. He had no collar or tags at the time. If you see him please reply to this post or call us at 703-447-1575 with location and time of the sighting. Please do not attempt to chase him if he runs. Linus requires daily medication and it's been over a week. **Update** Last seen at the corner of Ox Rd (RTE 123) and Lee Chapel Rd. Reward of $1000 if recovered no questions asked. Thank you.