More than 100 dogs have been rescued in raids on two properties linked to show dog breeding near Euroa in northern Victoria, the RSPCA has said.

RSPCA inspectors, veterinarians, nurses and animal attendants, along with Victoria Police, executed the warrants at Longwood on Tuesday.

The RSPCA said 119 small breed dogs were seized or surrendered, while six cats were also taken.

Four dead dogs were also removed from the property, it said.

"All of the animals were taken into care because of immediate and serious concerns for their welfare," the RSPCA said.

"The dogs, including Chihuahuas, Chinese crested and spaniels, were allegedly found to be living in small cages and squalid conditions, both inside and outside the residences."

The raid was one of several ongoing investigations into "large-scale animal cruelty involving dogs" in Victoria, the welfare organisation said.

"All of the seized and surrendered animals were transported to an RSPCA facility where they are receiving veterinary care," it said.

Thirteen notices to comply were given to the properties' owners for a number of dog, cats and birds not in immediate danger, but had issues relating to health, hygiene husbandry and food and water, according to the RSPCA.