Police will be back out knocking on doors on Monday in a community just northeast of Toronto to try to get some leads on the discovery of some severed cat heads.

Investigators with York Regional Police spent Sunday canvassing residents in the town of Whitchurch-Stouffville to see if anybody spotted something suspicious.

Det. Scott Hunter says investigators are asking residents if they remember seeing anything unusual in the weeks since the first severed head was discovered Aug. 12.

Police say that since then other severed heads of cats have been found in a number of separate discoveries.

In one case, a head and two legs were discovered near a daycare centre.

Police don't know why the felines were dismembered, but investigators believe someone is acting intentionally.

The matter was brought to their attention by municipal bylaw officers, Hunter said.

"When they started seeing heads displayed prominently along a roadway, things started to add up and it just wasn't looking right," Hunter said.

Police have said the heads were all placed within a one-kilometre area of residential neighbourhoods.

Pet owners are being urged not to leave their animals unattended outdoors.

Police hope to talk to as many as 1,400 residents by the time they've finished their door knocking on Monday.