Warm weather early in the year means rattlesnakes are more active than usual following April's breeding season, and local dogs could be bearing the brunt of it, animal experts said.
"Our calls are up -- calls on dogs bitten, dogs dying and quite a few people bitten," said Al Wolf of the Sonoma County Reptile Rescue Center in Sebastopol. "By the end of May, we're usually at about 25 rattlesnakes; this year we're at 85 already."
PetCare Veterinary Hospital in Santa Rosa has seen a 30 percent increase in rattlesnake bites affecting pets this year.
"We had twice as many bites in April compared to last year, and it's really unusual," said Dr. Nicholas Davainis. "We also saw some much earlier in the year, even one in January."
Carolyn Cole-Schweizer, who lives near Annadel Heights above Bennett Valley, lost her Jack Russell terrier to a rattlesnake bite early this month. The terrier discovered a rattlesnake in the backyard and suffered three bites in the leg before dying of the injuries.