Have you checked with vets in your area? Maybe the owner spoke with them, or left a "LOST" sign.
I googled vets with your zip code. Maybe you could call.
A. Animal Clinic - maps.google.com - (269) 344-5663
B. Pet Vet Family Pet Care Center -
PetVet - (269) 382-6200
C. Southwest Michigan Animal Hospital -
Pennfield Animal Hospital - (269) 381-5228
D. Richland Animal Hospital -
Richland Animal Hospital PC, Richland Michigan serving Gull Lake Mi, Richland MI and Delton Mi. - (269) 629-9010
E. Sprinkle Road Veterinary Clinic -
VetCor - Quality Veterinary Medicine - Welcome to VetCor - (269) 349-6060
F. Gull Lake Animal Hospital -
Gull Lake Animal Hospital and Boarding Kennel - (269) 629-5560
G. Kalamazoo Animal Hospital PC -
KALAMAZOO ANIMAL HOSPITAL - (269) 381-1570
H. Kalamazoo Humane Society -
Kalamazoo County Humane Society - Welcome - (269) 345-1181
I. Crestview Animal Hospital - maps.google.com - (269) 382-2852
J. Eighth Street Veterinary Care -
Eight Street Veterinary Care - Kalamazoo Home - (269) 375-9416