Gigantic Killer Frogs!

I wonder if this is why we haven't seen much of Rifleman and Stormy lately.
Gigantic killer frogs overrun B.C.
VANCOUVER - American bullfrogs that can grow to the size of dinner plates and eat other local frogs are spreading through the ponds and streams of British Columbia -- and their voracious appetites threaten to throw the province's delicate ecosystem out of balance.