His hobby is keeping tropical fish.
Our house cat is very friendly.
There is an obligation to implant a microchip in pet dogs.
pet dog; one's dog
free-range rearing; pasturing; grazing · letting run loose; letting run free
rearing from infancy; raising from a young age · training from an early age; grooming from childhood
cormorant fishing · cormorant fisherman
keeping a domestic animal beyond its useful life · keeping an employee on the payroll without utilizing their skills
fodder; feed
keeping a pet outdoors
free-range farming; floor feeding
raising an animal oneself; keeping an animal by oneself
cattleman; cattle farmer; raising cattle
shepherd; shepherdess
swineherd; swine herding
pasturing; turning out to graze
manger; feeding trough
pet cat; house cat
pet bird; cage bird
The noun form of the verb 飼う (to keep/raise an animal), using the continuative stem 飼い. The prefix use derives from this noun.