Dangerous substances, like ketamine and euthanasia drugs, have been stolen from a veterinary practice in Weymouth.
Police are warning anyone who takes these drugs is putting their lives at serious risk.
The Moorcroft Veterinary Practice on Dorchester Road called officers at 8:27 this morning (Friday 19 July) to report the burglary.
Thieves forced their way into a secure cabinet and stole its entire contents.
Police say these substances should only be administered under clinical supervision and taking them could be prove to be fatal.
Officers want anyone who may know where these drugs are to get in touch with them immediately either on 101 or calling Crimestoppers anonymously on 0800 555 111 or via www.crimestoppers-uk.org.