Police are investigating the deaths of more than 30 sheep at a farm near Hailsham.
The dead livestock, which included 27 lambs and three adult sheep, were found dead in a field on April 15.
Two rottweiler dogs have been seized in connection with the deaths on land kept by Court Lodge Farm, Rushlake Green.
The dogs were taken as Sussex Police swooped on a property near to the farm on Wednesday, April 17.
A man was questioned at the property as police officers executed a search warrant at the nearby fishery.
The 34-year-old man was interviewed under caution during the raid.
The man was interviewed by police officers on suspicion of being in charge of dogs worrying livestock on agricultural land.
The offence comes under the Dog (Protection of Livestock Act) 1953.
A Sussex Police spokesman said: “Police received a report on Tuesday, April 16 that 27 lambs and three adult sheep had been found dead in a field at Court Lodge Farm, Rushlake Green, on the previous day.
“Following enquiries, local officers executed a search warrant at a nearby fishery on Wednesday, April 17 where they seized two rottweiler dogs.
“A 34-year old man at that site was interviewed under caution on suspicion of an offence under the Dog (Protection of Livestock Act) 1953 - ie being in charge of dogs worrying livestock on agricultural land.”
The dogs are currently being kept in secure kennels while police continue with their enquiry.