fancier:
(plural: ‘fanciers‘)

cat fanciers with a prize-winning cat
a person who has an active or business interest in breeding or training certain types of dogs, horses, birds, plants, etc. — a bird fancier, a dog fancier, a horse fancier, etc.;
a person who has a special interest/liking for something,

a pigeon fancier with his pigeons
My dad was a fancier of model aeroplanes, and our sitting was full of the miniature aeroplanes he had made or bought from others.
Mason is a bird fancier who knows many facts about birds and how to breed and sell them.
The lake near our town attracts many species of birds and we see lots of bird fanciers visiting the lake just to watch birds come and go.
Pigeon fanciers and falconers are under constant pressure from the animal lovers groups who fight for the welfare of animals in general.
