
The most recent happened at a farm in Hoo, near Wickham Market, between 9pm on Saturday, August 17 and 7am the following day.
A spokeswoman for Suffolk police said because horses were left in open fields it was sometimes difficult to catch offenders in the act.
However she urged anyone who spotted any suspicious activity to report it immediately.
"It is quite likely that in most cases a vehicle may have been used to get to more rural locations," she said. "In this incident it looks like someone had their headlights on.










