A man wanted on suspicion of assault after a woman suffered "life-changing" injuries from suspected dog bites at a kennels has been named by police.
Nijamul Islam, 41, of Edgware, London, is believed to have run the compound housing about 100 dogs at Warren Farm in Great Amwell, Hertfordshire.
The 30-year-old woman from London was attacked by two German Shepherd dogs.
Two men, aged 20 and 27, from Edmonton and Buckinghamshire, were arrested at the scene and bailed.
The woman had been cleaning at the premises in an area off the B1502 Stanstead Road when the attack took place.
She was taken to the Lister Hospital in Stevenage at about 15:15 BST on 8 October with serious injuries to her arms and is still receiving treatment.
The two dogs, which ran from the scene but were captured later by police, remain in kennels.
Ninety-nine other dogs of varying breed and ages were also found.
Hertfordshire Police said the animals had been kept in "unacceptable" conditions and it was working with the RSPCA and East Herts District Council to deal with their welfare.
The RSPCA is caring for 59 dogs from the site but the remaining 40 animals had been put down "due to ill health and concerns of [their] aggressive nature", a spokesman said.
Ch Insp Gerry McDonald said the victim's injuries were "life-changing".
He said: "I would appeal to anyone who knows of the whereabouts of Nijamul Islam to contact police immediately.
"All of the animals have now left the site and all roads and public footpaths are open and safe to return to."