Dogs owners in North East Lincolnshire could face up to 5 years in jail if their pets bite someone as new laws come into effect.
The death of a six-day-old baby and 11-month-old infant earlier this year sparked a public outcry for new legislation to be introduced.
The changes mean a dog owner could be sent to prison for 14 years in the event of a fatal attack. The previous maximum sentence was two years.
The Government has brought in the amendments under the Anti-Social Behaviour, Crime and Policing Act 2014, which has updated offences under the Dangerous Dogs Act 1991.
Instances where dogs are specifically used as weapons and cause death can still see owners prosecuted for manslaughter or murder.
Animal welfare minister Lord de Mauley said: "Dog attacks can have horrific consequences for victims and families and it is only right those responsible should face tough punishments.
"Irresponsible dog owners will not only face longer prison sentences, but will also be liable for prosecution regardless of where an attack takes place, even in their own home.
"This will give protection to those who provide vital services in the community – postal workers, nurses, utility workers – as well as people visiting family and friends."
The new rules also offer protection to assistance dogs, such as guide dogs for the blind and deaf.
Owners found guilty of allowing an attack on an assistance dog could be jailed for up to three years, with rule-makers recognising that the loss of such a dog through an attack often meant the loss of any independence.
