A friend and I had an interesting discussion yesterday regarding what constitutes a pet. For the most part, I don't think of my turtle as being the focus of those rental agreements that say "no pets". Pets are usually, and overwhelmingly, dogs and cats with maybe a hamster, guinea pig or gerbil for the younger people. Possibly a rabbit. My friend has an aquarium full of fish. She doesn't really think of them as pets, but more of a collection. Otherwise she'd be saying "I have 21 pet tropical fish" which sounds silly. We decided that a pet involves a degree of interaction between human and animal. The fish mostly interact with each other and my turtle at the moment is not interacting at all until he emerges from hibernation.
Anyway, for pets on stamps I have been looking forward to sharing a few from a 1963/4 series of dogs and cats.
above we have a Poodle, a Bulldog and an Airedale
and below a Persian, Siamese and European
and my favourite...
These are all the works of Polish illustrator Janusz Grabiańsk (1929-1976).
If you are not familiar, look at his luscious illustrations for children's books.