A kidnapped dog will go blind unless it is given daily medication, its devastated owners have warned.
Denise Arnold and her partner, Anthony Thomas-Chambers, were baling the hay in the fields on their farm in White Horse Lane in Finchampstead last Friday when their two dogs were taken at around 10am.
Miss Arnold finished baling and realised the dogs, which had been running around a nearby field, were gone.
One is a long-coated Jack Russell named Fifi, while the other is a pedigree miniature Pinscher.
However, the six-year-old Pinscher, Shammy, has a genetic eye disorder and as a result has only one eye. It needs regular eye drops to prevent incurable blindness.
The owners are particularly concerned, as Fifi has been kidnapped before.
Last time, travellers sold her within four hours at a roadside in Newbury. The new owner, who bought her for £100, took her to the vet, who discovered she had a microchip and had been stolen.
Miss Arnold said she believes the thieves may not have realised Shammy is blind in one eye, as the dog has black fur around where its eye should be.
She added they are not suitable as house pets.
“They are farm dogs,” she explained.
White Horse Lane is not an often-used thoroughfare and so the owners believe that the dogs have been deliberately targeted.
Shammy is black and tan, with ears that stand up. She also has a docked tail.
Miss Arnold said: “It’s heartbreaking that they have been taken.
“We were supposed to go to Berlin next week and obviously we have now had to cancel. If someone finds them, please call the dog warden.
“We will give a reward of £300 for the dogs and if someone has bought them we will give them their money back."
Anyone finding the dogs can call Miss Arnold on (0118) 973 5115 or 07738 352150.